Question

How many times a wheel of radius 28 cm must rotate to go 352 m? (show ur working too)

Answer 1

Let wheel must be rotate n times of its circumference.

Radius of wheel = 28 cm and Total distance = 352 m = 35200 cm

`\therefore \text{Distance covered by wheel = n}* \text{circumference of the wheel}`

`\implies35,200=n*2\pi r`

`\implies35,200=n*2*(22)/(7) *28`

`\implies n= (35,200 *7)/(2*22*28)`

`\implies n=200 \ \text{revolutions}`.

Thus, wheel must rotate 200 times to go 352 m.