Question

A road roller takes $750$ complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is $84$ cm and length is $1$ m.

Answer 1

Given:

$\Rightarrow$$D=84cm,l=1m$

$\Rightarrow$$r=42cm$

$\Rightarrow$Area of road covered in $1$ revolution $=2\pi rl$ $=2\times \frac{22}{7}\times 42\times 1=\frac{264}{100}$ sq m

$\Rightarrow$Area of road covered in $750$ revolution = $750\times \left(\frac{264}{100}\right)$ $=1980$ sq m