Question

the radius of circular wheel is 10.5m how many revolutions will it take to cover a distance of 9900m

Answer 1

at first there is given a radius =10.5m
so we find circumference= 2pie r
2 X 22/7 X 10.5 = 66m
distance covered=9900m
no. of revolution =9900/66 = 3300/22 =1650/11 =150 is the answer

Answer 2

radius =10.5m
circumference= 2×22÷7×r
= 2×22÷7×10.5=66m
how many time it revolutions will it take to distance=9900÷66=150times