Question

find the diameter of a wheel whose circumference is 264cm

Answer 1

let the diameter be x
Now
circumference= 264
2 x 22/7 x x/2 = 264
x = 264 x 7/22
x=84
diameter=84 cm

Answer 2

Let the radius of the wheel be 'r'
Circumference = 264 cm
=>2πr = 264
=>2 x 22/7 x r = 264
=> r = 264 x 7/44
=> r = 42 cm

Diameter of the wheel  = 2r = 2 x 42 = 84 cm