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A certain number of people were to contribute equally to buy books worth sh.1200 for a school library. Five people pulled out, so the others...
(Solved)
A certain number of people were to contribute equally to buy books worth sh.1200 for a school library. Five people pulled out, so the others agreed to contribute on extra sh.10 each. Their contributions enabled them to buy books worth sh.200 more than originally expected.
(a) If the original number of people was x, write an expression of how much each was originally
to contribute.
(b)Write down two expression of how much each contributed after the five people pulled out.
(c) Calculate how many people made the contribution.
Date posted:
August 9, 2019
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Answers (1)
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A wooden drum closed at the top and bottom has a top radius of 28cm and bottom radius 21cm, its height is 90cm. The drum...
(Solved)
A wooden drum closed at the top and bottom has a top radius of 28cm and bottom radius 21cm, its height is 90cm. The drum is covered with leather excluding the top and bottom.

Calculate;
(a) The volume of the drum in litres
(b) The area of the leather covering the drum excluding the top and bottom.
Date posted:
August 9, 2019
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Answers (1)
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Find the number of sides of a regular polygon whose sum of interior angle is 25200
(Solved)
Find the number of sides of a regular polygon whose sum of interior angle is 25200
Date posted:
August 9, 2019
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Answers (1)
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In the figure below QOT is a diameter and angle QTP = 480, angle TQR = 760 and angle
SRT = 370.
Calculate giving reasons in each...
(Solved)
In the figure below QOT is a diameter and angle QTP = 480, angle TQR = 760 and angle
SRT = 370.

Calculate giving reasons in each case
(a) Angle RST
(b) Angle SUT
(c) Obtuse angle ROT
(d) Angle PST
(e) Reflex angle SOP
Date posted:
August 9, 2019
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Answers (1)
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A straight road is northwards along the top of a vertical cliff of height 40m. A man at the top of the cliff spots a stationary...
(Solved)
A straight road is northwards along the top of a vertical cliff of height 40m. A man at the top of the cliff spots a stationary boat on a bearing of 900 from the foot of the cliff and at an angle of depression of 300. He walks northwards and after one minute views the stationary boat on a bearing of 1100 from the foot of the cliff as he moves at a constant speed.
(a) Make a sketch to represent the position of the man and the boat.
(b) Calculate the distance of the boat from the foot of the cliff.
(c) Find the shortest distance from the position of the man to the stationary boat after 1 minute
(d) Calculate the speed of the man in meters per second.
Date posted:
August 9, 2019
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Answers (1)
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The ends of the roof of a workshop are segment of a circle of radius 10m. The roof is 20m long . The angle of...
(Solved)
The ends of the roof of a workshop are segment of a circle of radius 10m. The roof is 20m long . The angle of the centre is 1200 as shown in the figure below

(a) Calculate:
(i) The area of one end of the roof.
(ii) The area of the curve surface of the roof.
(b) What would be cost to the nearest shilling of covering the two ends and the curved surface with galvanized iron sheet costing sh.80 per square meter.
Date posted:
August 9, 2019
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Answers (1)
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Solve for x in the equation
2 log x + log 5 = 1 + 3 log 2.
(Solved)
Solve for x in the equation
2 log x + log 5 = 1 + 3 log 2.
Date posted:
August 9, 2019
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Answers (1)
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Three towns A, B, and C are situated such that B is 50 km on a bearing of 1500 from town B
(a) Draw a sketch...
(Solved)
Three towns A, B, and C are situated such that B is 50 km on a bearing of 1500 from town B
(a) Draw a sketch showing the positions of towns A, B and C.
(b) Calculate;
(i) The size of Angle ABC
(ii)The distance of C and A
Date posted:
August 9, 2019
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Answers (1)
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The angle of elevation of the top of a tree from a point P is 22.60. From another point Q which is 12m from the...
(Solved)
The angle of elevation of the top of a tree from a point P is 22.60. From another point Q which is 12m from the base of the tree, the angle of elevation of the top of the tree is 47.50
(a) The height of the tree
(b) The distance between P and Q
Date posted:
August 9, 2019
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Answers (1)
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The length of a rectangle is increased by 25% while its width is decreased by 5%. Determine the percentage increase in the area of the...
(Solved)
The length of a rectangle is increased by 25% while its width is decreased by 5%. Determine the percentage increase in the area of the rectangle.
Date posted:
August 9, 2019
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Answers (1)
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A straight line passing through the points P(4,5) also passes through the origin and makes an acute angle theta with the x – axis. Calculate...
(Solved)
A straight line passing through the points P(4,5) also passes through the origin and makes an acute angle theta with the x – axis. Calculate to 2 decimal places the sizes of angle theta.
Date posted:
August 9, 2019
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Answers (1)
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The figure below shows a circle centre O and AOB is a sector of the circle and angle AOB = 720 as shown. Given that the...
(Solved)
The figure below shows a circle centre O and AOB is a sector of the circle and angle AOB = 720 as shown. Given that the area of a sector AOB is 5pi cm2, find the radius of the circle and hence calculate the area of the shaded part.

Date posted:
August 9, 2019
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Answers (1)
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Evaluate without using mathematical table or calculator.
(Solved)
Evaluate without using mathematical table or calculator.

Date posted:
August 9, 2019
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Answers (1)
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If each interior angle of a regular polygon is 1500, how many sides does the polygon have?
(Solved)
If each interior angle of a regular polygon is 1500, how many sides does the polygon have?
Date posted:
August 9, 2019
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Answers (1)
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A swimming pool is 20m by 12m and it slopes gently from a depth of 1m at the shallow end to a depth of 3m...
(Solved)
A swimming pool is 20m by 12m and it slopes gently from a depth of 1m at the shallow end to a depth of 3m at the deep end.
(a) Calculate the volume of water in the swimming pool (in m3) when it is full.
(b) If the swimming pool is to be drained by a pump which removes water at the rate of 2.5m3 per minute, how long will it take this pump to drain the swimming pool if it was full?
(c) If the sides of the swimming pool and its floor are to be covered with square tiles of side 20cm, find to the nearest 100 the number of tiles required.
Date posted:
August 9, 2019
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Answers (1)
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Two vertical columns A and B of height h and 2h respectively stand on level ground and are 100m apart. Two points P and Q...
(Solved)
Two vertical columns A and B of height h and 2h respectively stand on level ground and are 100m apart. Two points P and Q are d metres apart, the elevation of the top of A and B from point P are 350 and 280 respectively and the elevation of top of B from point Q is 750
Calculate
(a) The vertical heights of the two columns in metres
(b) The distance PQ in metres
Date posted:
August 9, 2019
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Answers (1)
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The figure below shows a plan of a roof with a rectangular base ABCD. AB = 20cm and BC = 12cm. the ridge PQ =...
(Solved)
The figure below shows a plan of a roof with a rectangular base ABCD. AB = 20cm and BC = 12cm. the ridge PQ = 8cm and is centrally placed. The faces ADP and BCQ are equilateral triangles. N is the midpoint of AD

Calculate:
(a) The length of PN
(b) The altitude of P above the base.
(c) The angle between the planes ABQP and ABCD.
(d) The obtuse angle between the lines PQ and DB
Date posted:
August 9, 2019
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Answers (1)
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A prism of length 20cm is represented by the diagram below whose cross section is an equilateral triangle of side 7cm.
(Solved)
A prism of length 20cm is represented by the diagram below whose cross section is an equilateral triangle of side 7cm.

(a) Draw a sketch net of the prism and label it correctly.
(b) Calculate
(i) The area of the triangular end
(ii) The total surface area of the prism
(iii) The volume of the prism.
Date posted:
August 9, 2019
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Answers (1)
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In the figure below, O1 and O1 are the centres of the circles whose radii are 4 cm and 7 cm respectively. The circles intersect...
(Solved)
In the figure below, O1 and O1 are the centres of the circles whose radii are 4 cm and 7 cm respectively. The circles intersect at A and B and angle AO1O2 = 60˚

Find by calculation; take π = 3.142
(a) The angle AO2O1
(b) The area of the quadrilateral AO1BO2
(c) The shaded area
Date posted:
August 9, 2019
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Answers (1)
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Three business partners, Bela, Joan and Trinity contributed Kshs. 112, 000, Kshs. 128, 000 and Kshs. 210, 000 respectively to start a business. They agreed...
(Solved)
Three business partners, Bela, Joan and Trinity contributed Kshs. 112, 000, Kshs. 128, 000 and Kshs. 210, 000 respectively to start a business. They agreed to share their profits as follows:
30% to be shared equally
30% to be shared in the ratio of their contributions
40% to be retained for the running of the business.
If at the end of the year, the business realized a profit of Kshs. 1. 35 million
Calculate:
(a) the amount of money retained for running the business at the end of the year.
(b) the difference between the amounts received by Trinity and Bela.
(c) Express Joan’s share as percentage of the total amount of money shared between the three partners.
Date posted:
August 9, 2019
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Answers (1)