Circumference of a Circle

Author:R. D. Sharma
7th CBSE
IMPORTANT

Important Questions on Circumference of a Circle

MEDIUM
IMPORTANT

A well of diameter 150 cm has a stone parapet around it. If the length of the outer edge of the parapet is 660 cm, then find the width of the parapet (in cm).   (use: π=227 )

MEDIUM
IMPORTANT

A wire of 5024 m length is in the form of a square. It is cut and made a circle. Find the ratio of the square to that of the circle.  ( use: π=227 ).

MEDIUM
IMPORTANT

An Ox in a kolhu (an oil processing apparatus) is tethered to a rope 3m long. If the distance covered in 14 rounds is k m, find k.

EASY
IMPORTANT

A water sprinkler in a lawn sprays water as far as 7 m in all directions. If the length of the outer edge of wet grass is  k m, find k. (use: π=227 ).