Question

The diameter of a road roller is 140cm and its length is 2.2m. It takes 400 complete revolutions to move over to level a stretch of a road 2.2m wide find the surface area of stretch of road leveled in m sq.

Answer 1

one sec

Answer 2

The area of each circle is A = πr2.
The area of the rectangle is A = πdh.

Answer 3

but roller is in shape of cylinder

Answer 4

yes

Answer 5

so how to solve it

Answer 6

It should have the radius

Answer 7

diamter / 2 = radius

Answer 8

here radius = 0.7m