Question

A cylindrical roller 2.5m in length, 1.75m in radius when rolled on a road was found

to cover the area of 5500 m2

. How many revolutions did it make?​

Answer 1

Answer:

Length/Height = 2.5 m

Radius = 1.75 m

CSA = 2*pi*r*h = 2*22/7*2.5*1.75 = 27.5 m²

Area covered = 5500 m²

∴ Revolutions = 5500/27.5 = 200