Question

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

Answer 1

Solution:-

Given : Diameter of roller = 84 then radius = 84/2 = 42 or 0.42 m and height = 1 m

In one revolution, the road roller will cover an area equal to its lateral surface area.

So, in one revolution the area of the road covered = 2πrh

= 2*22/7*0.42*1

Area of the road in one revolution = 2.64 sq m

Therefore, in 750 revolutions, the area of the road = 2.64*750

= 1980 sq m

hope it helps you

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Answer 2

Your Reqd. Answer is 1980 m² ...............