Question

A road roller takes 750 complete revolutions to move once over to level the road .find the area of the road if the diameter of a roadroller is 84 cm and lenght is 1 .25 m.

Answer 1

Step-by-step explanation:

Area of road =750× area covered in 1 revoluation

=750× lateral surface area of cylinder

=750×2pierh

Given, d=84cm⇒r=42cm→

100

42m

h=1m

=750×2× 22/7×

100

42

×1

×

100

42

×1

=

100

1500×132

=1980m square