Question

Find the number of revolution taken by the wheel of the truck to cover a distance 78.5km if thhe distance if the wheel is one meter

Answer 1

given:-

diameter=1m

therefore radius=0.5m

circumference=2πr

=2×3.14×0.5=3.14m

we know that 1km=1000m

therefore 78.5km=78500m

hence, no. of revolution=78500/3.14

=25000

hence, final answer is 25000 revolution.