Question

The radius of a roller is 42 cm and its length is 1.20 find the number of revolution in will take to move once to level at the ground of the area is 1584m2

Answer 1

Step-by-step explanation:

r = 0.42m , h = 1.20m

no.revolutions = area divided by CSA = 1584/2x3.14x0.42x1.2 = 500 revolutions