Question

A road roller takes 800 complete revolutions to move once over the level road. Find the area of the road if the diameter of a road roller is 84cm and length is 1m.​

Answer 1

Answer:

Given:

⇒D=84 cm,l=1m

⇒r=42cm

⇒Area of road covered in 1 revolution =2πrl =2×

7

22

×42×1=

100

264

sq m

⇒Area of road covered in 750 revolution = 750×(

100

264

) =1980 sq m