CIRCUMFERENCE OF CIRCLE WORD PROBLEMS WORKSHEET

Problem 1 :

On decreasing the radius of the circle by 30%, its area decreased by

a)  30%      b)  60%     c)  75%     d)  None of these

Solution

Problem 2 :

In making 1000 revolutions, a wheel covers 88 km. The diameter of the wheel is 

a)  14 m     b)  24 m    c)  28 m     d)  40 m

Solution

Problem 3 :

The diameter of the wheel is 40 cm. How many revolutions will it make an covering 176 m ?

a)  140     b)  150    c) 160     d)  166

Solution

Problem 4 :

The radius of the wheel is 0.25 m. How many revolutions will it take in covering 11 km ?

a)  2800     b)  4000    c) 5500     d)  7000

Solution

Problem 5 :

Find the circumference of a circle of diameter 21 cm

a)  62 cm     b)  64 cm    c) 66 cm     d)  68 cm

Solution

Problem 6 :

Find the area of the circle whose circumference is 52.8 cm

Solution

Problem 7 :

A steel wire when bent in the form of a square, encloses an area 121 sq.cm. The same wire is bent in the form of circle. Find the area of the circle ?

Solution

Problem 8 :

A bicycle wheel makes 5000 revolutions in moving 11 km. Find the diameter of the wheel.

Solution

Problem 9 :

The diameter of the wheels of a bus is 140 cm. How many revolutions per minute must a wheel make in order to move at the speed of 66 km/hr ?

Solution