Question

the diameter of a wheel is 28 cm . how many revolutions will it make to travel 352 m?

Answer 1

Radius, R = 28/2 = 14 cm = 0.14 m
Circumference = 2π R
= 2 × 22/7 × .14
= 44 × 0.02
= 0.88 m
No. of revolution=total distance travelled/ circumference
= 352/0.88 = 400
Hence, no of revolution are = 400
Hope it may help you !!!!!

Answer 2

the area of the circle wheel = pi r²   (  the radius = 28/2=14)

=  22/7 * 14*14=    616 cm²

revolutions = 616* 325

= 200200 revolutions