Answer:
50,020 revs to nearest rev.
Step-by-step explanation:
r = 1/2 * diameter
Circumference of the wheel = 2 pi r
= 2 * pi * 1/2 * 77
= 77pi cms
1 km = 1000 * 100 cms so
The number of revolutions = (121 * 100 * 1000) / 77pi
= 50,020 revs to nearest rev.
