Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

The marked price of a modern camera is Kes 24,000. A trader sold it to a customer at a 10% discount.

The marked price of a modern camera is Kes 24,000. A trader sold it to a customer at a 10% discount. If the trader still made a profit of 20% on the cost price, what was its cost price?

Answers

Wilfykil answered the question on August 19, 2019 at 09:49

Answer Attachments

Next: The figure below is a semi-cylindrical solid of length 18cm and radius 3.5cm as shown

Previous: On the figure below, Lm is parallel to PQ. Angle MLR = 30⁰ and angle RPQ = 70⁰.

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

The figure below is a semi-cylindrical solid of length 18cm and radius 3.5cm as shown (Solved)

The figure below is a semi-cylindrical solid of length 18cm and radius 3.5cm as shown.

(a) Draw the labeled net of the solid.
(b) Find the surface area of the solid.

Date posted: August 19, 2019 . Answers (1)
The equation of a straight line L1 is given by 2y + 8x – 10 = 0. (Solved)

The equation of a straight line L1 is given by 2y + 8x – 10 = 0. Another line L2 cuts L1 at right angles such that the point of intersection of the two lines has coordinates (-3, k).
(a) Find the value of k.
(b) Hence find the equation of L2.

Date posted: August 19, 2019 . Answers (1)
A tower is on a bearing of 030^o from a point P and a distance of 100 m. From P, the angle of elevation of... (Solved)

A tower is on a bearing of 030^o from a point P and a distance of 100 m. From P, the angle of elevation of the top of the tower is 15^o and the angle of depression of the foot of the tower is 1.
(a) Find the height of tower.
(b) A point Q is on the same horizontal plane as point P. The tower is on a bearing 330^o from Q and a distance of 70 m.
Calculate the:-
(i) Bearing of Q from the tower.
(ii) The distance from P to Q
(iii) bearing of P from Q.

Date posted: August 19, 2019 . Answers (1)
The figure below shows two circles with centres O1 and O2 and intersecting at A and B.Angles AO1B = 60^o, AO2B = 80^o, AO1 =... (Solved)

The figure below shows two circles with centres O1 and O2 and intersecting at A and B.Angles AO1B = 60^o, AO2B = 80^o, AO1 = O1B = 8cm

Calculate
(a) AB
(b) AO2
(c) Area of the shaded region.

Date posted: August 19, 2019 . Answers (1)
(a) A curve whose equation is in the form y = mx³ - nx where m and n are constants passes through the point (1,... (Solved)

(a) A curve whose equation is in the form y = mx³ - nx where m and n are constants passes through the point (1, 2). Its gradient at the given point is 10. Find the values of m and n.

(b) Use the trapezium rule to find the area bounded by the curve y = x² + 4, the x-axis and the lines
x = 0 and x = 4. Use five ordinates.

(c) Calculate the exact area bounded by the curve, y = x² + 4, the x-axis and the lines x = 0 and x = 4. Hence find the percentage error in (b) above.

Date posted: August 19, 2019 . Answers (1)
One interior angle of a polygon is equal to 80° and each of the other interior angles are 128° (Solved)

One interior angle of a polygon is equal to 80° and each of the other interior angles are 128°. Find the number of sides of the polygon.

Date posted: August 19, 2019 . Answers (1)
Using a pair of compasses and a ruler only construct a triangle ABC such that AB = 6cm, BC = 8cm (Solved)

(a) Using a pair of compasses and a ruler only construct a triangle ABC such that AB = 6cm, BC = 8cm and ABC = 135°.
(b) Construct the height of triangle ABC in (a) above taking BC as the base and measure the height.

Date posted: August 19, 2019 . Answers (1)
(i) Express 48 and 6 0 as a product of their prime factors. (ii) A rectangle of side 48cm by 60cm is divided into squares... (Solved)

(i) Express 48 and 60 as a product of their prime factors.
(ii) A rectangle of side 48cm by 60cm is divided into squares of side X cm.Find the greatest value of X.

Date posted: August 19, 2019 . Answers (1)
The coordinates of P and Q are P(5, 1) and Q(11, 4) point M divides line PQ in the ratio 2 : 1. (Solved)

The coordinates of P and Q are P(5, 1) and Q(11, 4) point M divides line PQ in the ratio 2 : 1. Find the magnitude of vector OM.

Date posted: August 19, 2019 . Answers (1)
A translation maps triangle ABC onto A1B1C1, where A(1,-1), B( 3, 1) C ( 3,1) and C1 ( -1, 3).Find the coordinates of A1 and... (Solved)

A translation maps triangle ABC onto A1B1C1, where A(1,-1), B( 3, 1) C ( 3,1) and C1 ( -1, 3).Find the coordinates of A1 and B1.

Date posted: August 19, 2019 . Answers (1)
The curved surface area of a cylindrical container is 1980 cm². (Solved)

The curved surface area of a cylindrical container is 1980 cm². If the radius of the container is 21cm,
calculate to one decimal place the capacity of the container in litres

Date posted: August 19, 2019 . Answers (1)
In a class there are thrice as many boys as girls a third of the boys are from poor families while a fifth of the... (Solved)

In a class there are thrice as many boys as girls a third of the boys are from poor families while a fifth of the girls are from rich families. Find the percentage number of pupils from rich families in the class.

Date posted: August 19, 2019 . Answers (1)
Fifteen men working eight hours a day can complete a certain job in exactly 24 days. (Solved)

Fifteen men working eight hours a day can complete a certain job in exactly 24 days. For how many hours a day must sixteen men work in order to complete the same job in exactly 20 days.

Date posted: August 19, 2019 . Answers (1)
A rectangular tank whose length is 50 cm and width 30cm contains 36 litres of water. a) Determine the height of water in the tank. b)... (Solved)

A rectangular tank whose length is 50 cm and width 30cm contains 36 litres of water.
a) Determine the height of water in the tank.
b) A heavy rectangle block has a length which is 5cm more than the width and a height of 5cm. If the width of the block is x cm, write down an expression for the volume of the block
c) The block is placed in the tank and the water level rises by 1cm. Determine the width and length of the block.
d) Determine the mass of the block given that its density is 1400kg/m³

Date posted: August 19, 2019 . Answers (1)
Use tables of cubes, square roots and reciprocals to evaluate. (Solved)

Use tables of cubes, square roots and reciprocals to evaluate.

Date posted: August 19, 2019 . Answers (1)
Three similar 21 inch television sets and five similar 17 inch television cost Ksh.129,250. (Solved)

Three similar 21 inch television sets and five similar 17 inch television cost Ksh.129,250. The difference between the cost of two 21 inch television sets and four 17 inch television sets is Ksh.22,000. Calculate the price of a 21- inch television set and that of 17-inch television set.

Date posted: August 19, 2019 . Answers (1)
In the figure below PQRS is a cyclic quadrilateral. Given that TPX is a tangent at P and O is the centre of the circle.... (Solved)

In the figure below PQRS is a cyclic quadrilateral. Given that TPX is a tangent at P and O is the centre of the circle. RQX is a straight line with angle RPQ = 50⁰, and angle PRS = 25⁰.

Giving reasons in each case, find:
a) Angle PRQ
b) Angle PSR.
c) Angle PXQ
d) Angle TPS
e) Angle POS

Date posted: August 19, 2019 . Answers (1)
A cinema theatre has 200 seats. Tickets prices are Ksh 500 for adult and Ksh 250 for a child. a) One evening 80% of the seats... (Solved)

A cinema theatre has 200 seats. Tickets prices are Ksh 500 for adult and Ksh 250 for a child.
a) One evening 80% of the seats in the cinema are occupied. Twenty of the people present are children. Calculate the total amount of money obtained from the sale of tickets that evening.
b) On another evening x children are present and all the seat are occupied. If the money obtained from the sale of tickets is Ksh 90500. Calculate the value of x.
c) The money obtained from sale of tickets in a given week is used to pay for maintenance and expenses. The balance is the profit for the week. If the ratio of profit to expenses is 3:4 and that of expenses to maintenance is 5:6 and given that Kshs. 1062000 was collected in a given week, calculate the profit for the week.

Date posted: August 19, 2019 . Answers (1)
The three sides of a right angled triangle are (x-1), (2x+8) and the hypotenuse (3x+1), find the dimensions of the triangle. (Solved)

The three sides of a right angled triangle are (x-1), (2x+8) and the hypotenuse (3x+1), find the dimensions of the triangle.

Date posted: August 19, 2019 . Answers (1)
In the figure below, O is the centre of circle. Angle BCA=80⁰ and angle CBO = 10⁰. Determine the size of angle CAB. (Solved)

In the figure below, O is the centre of circle. Angle BCA=80⁰ and angle CBO = 10⁰. Determine the size of angle CAB.

Date posted: August 19, 2019 . Answers (1)