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 84cm and length is 1m.<p></p>

Given:
→D=84 cm, l=1m
→r=42cm
→Area of road covered in 1 revolution = 2πrl = 2 × 22/7 × 42 × 1 = 264 cm² = 0.0264 m²
→Area of road covered in 750 revolutions = 750 × (0.0264) = 19.8 m²

Eduprobe

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 84cm and length is 1m.

Solution: