Question

find the number of revolution taken by the wheel of a truck to cover a distance of 78.5 km if the diameter of wheel is 1m. π=(3.14)

Answer 1

Total revolution = total distance /2πr
Distance = 78.5km
= 78.5/1000 m
=.0785 m


.0785 / 2×3.14×1/2
.0785 / 3.14
.25..... Ans

Hope this will help u

Answer 2

HI !

Radius = r = 1/2 m

Circumference = 2πr = 2*3.14*1/2 = 3.14 m

Total distance to be covered = 78.5 km = 78500 m

Total revolutions to be made = Total distance to be covered/circumference
                                              = 78500/31.4
                                              = 2500 revolutions