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 the road roller is 84 cm and its length is 1 m.

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Radius = d/2 = 42cm

Length = 100 cm

Curved surface area of cylinder

= 2πrh

= 2×22/7×42×100

= 4400×6

= 26400 cm sq.

Convert into m = 26400/10000

= 2.64 m sq.

Covered area of roller = 2.64 ×750

= 1980 m sq.