Question

diameter of a roller is 84 cm and its length is 120 cm. The roller takes 150 complete revolution to move once over a plain ground to level it. find area of playgroung in squre meters

Answer 1

Its a cylinder
r=84 h=120
csa= 2pi rh =2×22/7×84×120=63360cmsq
area covered in 1 revolution=63360cmsq
In 150 revolutions= 63360×150=9504000cmsq
=9.5msq(Approx)

HOPE IT HELPS

Answer 2

I hope here is your answer
please check it.