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h varies directly as v and inversely as the square of r. Find the percentage change in h if v is increased by 20% and...
(Solved)
h varies directly as v and inversely as the square of r. Find the percentage change in h if v is increased by 20% and at the same time r is increased by 50%.
Date posted:
August 29, 2019
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Answers (1)
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In what ratio will coffee grade A costing kshs. 90 per kg be mixed with grade B costing kshs.60 per kg so that a profit...
(Solved)
In what ratio will coffee grade A costing kshs. 90 per kg be mixed with grade B costing kshs.60 per kg so that a profit of 25% is realized by selling the mixture at kshs.80 per kg.
Date posted:
August 29, 2019
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Answers (1)
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Use logarithm table to evaluate.
(Solved)
Use logarithm table to evaluate.
Date posted:
August 29, 2019
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Answers (1)
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A map is drawn to a scale of 1 : 50,000
(Solved)
A map is drawn to a scale of 1 : 50,000 find;
i) The distance in km between two places which are 25cm apart on the map.
ii) The area in cm2 of a field if the actual area of the field is 120,000m2
Date posted:
August 29, 2019
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Answers (1)
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The interior angles of a heptagon are (3p + 25)o,
(Solved)
The interior angles of a heptagon are (3p + 25)o, (2p – 20)o (2p + 35)o, 100o, 135o, 150o and 125o. Find P.
Date posted:
August 29, 2019
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Answers (1)
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Three business people, Mutua, Kamau and Mwiti contributed a total of ksh.164,500 to start a retail business.
(Solved)
Three business people, Mutua, Kamau and Mwiti contributed a total of ksh.164,500 to start a retail business. The ratio of contribution of Mutua to Kamau was 2 : 3, that of Kamau to Mwiti was 4 : 5. How much did Mutua contribute?
Date posted:
August 29, 2019
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Answers (1)
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Income tax is charged on annual income at the rates shown below.
A certain headmaster earns a monthly salary of Ksh. 8570. He is housed in...
(Solved)
Income tax is charged on annual income at the rates shown below.
A certain headmaster earns a monthly salary of Ksh. 8570. He is housed in the school and as a result, his taxable income is 15% more than his salary. He is entitled to a family tax relief of Kshs. 150 per month.
(a) How much tax does he pay in a year.
(b) From the headmaster’s salary the following deductions are also made every month;
W.C.P.S 2% of gross salary
N.H.I.F Kshs. 20
House rent, water and furniture charges Kshs. 246
Calculate the headmaster’s net salary.
Date posted:
August 28, 2019
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Answers (1)
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Grade A tea costs Ksh 100 per kg while grade B costs ksh 150 per kg. Find the ratio in which the two grades should...
(Solved)
Grade A tea costs Ksh 100 per kg while grade B costs ksh 150 per kg. Find the ratio in which the two grades should be mixed to get a mixture worth ksh.140 per kg.
Date posted:
August 28, 2019
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Answers (1)
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A quantity P is partly constant and partly varies as the cube of Q. When Q=1, P=23 and when Q =2, P= 44. Find the...
(Solved)
A quantity P is partly constant and partly varies as the cube of Q. When Q=1, P=23 and when Q =2, P= 44. Find the value of P when Q = 5.
Date posted:
August 28, 2019
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Answers (1)
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Find the sum to 20 terms of the series
Log2 + Log 4 + Log 8 + Log 16 + …….Give your answer to 3 significant...
(Solved)
Find the sum to 20 terms of the series
Log2 + Log 4 + Log 8 + Log 16 + …….Give your answer to 3 significant figures.
Date posted:
August 28, 2019
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Answers (1)
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A circle of radius 15cm is divided into ten equal sectors. In each sector, find:
a. The area of the triangle
b. The area of the...
(Solved)
A circle of radius 15cm is divided into ten equal sectors. In each sector, find:
a. The area of the triangle
b. The area of the segment
Date posted:
August 28, 2019
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Answers (1)
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If the length of a rectangle is increased in the ratio 7:3 and the width decreased in the 2:5, find whether the area is increased,...
(Solved)
If the length of a rectangle is increased in the ratio 7:3 and the width decreased in the 2:5, find whether the area is increased, and what ratio.
Date posted:
August 28, 2019
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Answers (1)
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By rationalizing the denominator, evaluate the following surds
(Solved)
By rationalizing the denominator, evaluate the following surds
Date posted:
August 28, 2019
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Answers (1)
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Mr. Bett wants to buy a flat screen TV set on hire purchase. The cash price is sh. 28,000. He can pay the cash Price...
(Solved)
Mr. Bett wants to buy a flat screen TV set on hire purchase. The cash price is sh. 28,000. He can pay the cash Price or make a down payment of sh. 8,000 and 15 monthly installments of sh. 2000 each. Calculate the rate of interest charged per month.
Date posted:
August 28, 2019
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Answers (1)
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Find all the integral values of x which satisfy the inequalities 3(3 – x) < 5x – 9 < 2x + 8
(Solved)
Find all the integral values of x which satisfy the inequalities 3(3 – x) < 5x – 9 < 2x + 8
Date posted:
August 28, 2019
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Answers (1)
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The velocity of a particle, Vm/s, moving in a straight line after t seconds is given by
V = 3t² - 3t – 6
Find:-
(i) The acceleration...
(Solved)
The velocity of a particle, Vm/s, moving in a straight line after t seconds is given by
V = 3t² - 3t – 6
Find:-
(i) The acceleration of the particle after 2 seconds.
(ii) The distance covered by the particle between t = 1 and t = 4 seconds.
(iii) The time when the particle is momentarily at rest.
(iv) The minimum velocity attained by the particle.
Date posted:
August 28, 2019
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Answers (1)
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In the figure below, C is a point on AB such that BA = 4BC and D is the mid point of OA OC and...
(Solved)
In the figure below, C is a point on AB such that BA = 4BC and D is the mid point of OA OC and BD intersect at x
a) Write the vectors below in terms of a and b
i) AB
ii) OC
iii) BD
b) If BX = hBD express ox in terms of a, b and h
c) If OX = kOC, find h and k
d) Hence express OX in terms of a and b only
Date posted:
August 28, 2019
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Answers (1)
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The fig shows two intersecting circles with centres A and B and radii 7cm and 10.5cm respectively. The distance between AB = 14 and AM:MB...
(Solved)
The fig shows two intersecting circles with centres A and B and radii 7cm and 10.5cm respectively. The distance between AB = 14 and AM:MB = 3:4.
Calculate to four significant fig the;
a) Size of angle CAD
b) Size of angle CBD
c) Area of shaded region (use pi= 3.142)
Date posted:
August 28, 2019
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Answers (1)
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The figure below is a model representing a rocket capsule. The model whose total height is 15cm is
made up of a conical top
(Solved)
The figure below is a model representing a rocket capsule. The model whose total height is 15cm is
made up of a conical top; a hemispherical bottom and the middle part is cylindrical. The radius of the
base of the cone and that of the hemisphere are each 3cm. The height of the cylindrical part is 8cm.
a) Calculate the external surface area of the model.
b) The actual rocket has a total height of 6 metres. The outside of the actual rocket capsule is to be
painted. Calculate the amount of paint required if an area of 20m2 requires 0.75 litres of the paint.
Date posted:
August 28, 2019
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Answers (1)
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A trader sold an item at sh7500 after allowing his customer 15% discount on the marked price of the item.
(Solved)
A trader sold an item at sh7500 after allowing his customer 15% discount on the marked price of the item. In so doing he made a profit of 35%.
a) Calculate
i) The marked price of the item
ii) The price at which the trader had bought the item.
b) If the trader had sold the item without giving a discount, calculate the percentage profit he would have made.
c) To clear his stock the trader decided to sell the remaining items at a loss of 10%. Calculate the price at which he sold each item.
Date posted:
August 28, 2019
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Answers (1)