Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

In a rhombus diagonals intersect at ______ angles.

A rhombus is a parallelogram in which ______ sides are equal.

All rhombuses are squares.

A Rangoli has been drawn on a flor of a house. ABCD and PQRS both are in the shape of a rhombus. Find the radius of semicircle drawn on each side of rhombus ABCD.

Diagonals of a quadrilateral are perpendicular to each other. Is such a quadrilateral always a rhombus? Give a figure to justify your answer.

ABCD is a rhombus such that the perpendicular bisector of AB passes through D. Find the angles of the rhombus.

Hint: Join BD. Then ∆ABD is equilateral.

Construct a rhombus whose side is 5 cm and one angle is of 60°.

Construct a rhombus CLUE in which CL = 7.5 cm and LE = 6 cm.

Product of 6a² – 7b + 5ab and 2ab is ______.

p²q + q²r + r²q is a binomial.

Multiply the following: 

a, a⁵, a⁶ 

Multiply the following: 

–7st, –1, –13st² 

Multiply the following: 

`- 100/9 rs; 3/4 r^3s^2`

Multiply the following:  

`(3/4x - 4/3 y), (2/3x + 3/2y)`

Multiply the following: 

`3/2 p^2 + 2/3 q^2, (2p^2 - 3q^2)`

The cost of a sewing machine is Rs 7,000. Its value depreciates at 8% p.a. Then the value of the machine after 2 years is Rs 5,924.80.

The value of a car, bought for Rs 4,40,000 depreciates each year by 10% of its value at the beginning of that year. So its value becomes Rs 3,08,000 after three years.

In the year 2001, the number of malaria patients admitted in the hospitals of a state was 4,375. Every year this number decreases by 8%. Find the number of patients in 2003.

The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. What was the population two years ago?

The volume of a cube whose edge is 3x is ______.