Question

A road roller makes 5000 revolution in covering 220 m. find radius of road roller

Answer 1

no. of revolutions =
(distance covered by roller/circumference of roller)

Using this let's put values,
distance= 220m
circumference of roller= 2πr
revolutions= 5000

putting values we get,
5000=220m /2πr
2πr = 220/5000
2πr = 0.044
2*(22/7)*r = 0.044

r= (44*7)/(2*22*1000)
r= 0.007m or converting into cm we get, 0.007*100 = 0.7cm

so, r= 0.007m or 0.7cm



hope this helps you