Question

Answer the following questions.
(1) A road roller takes 100 complete revolutions to move once over to
level a road. Find the area of the road if the diameter of the road
roller is 140 cm and length 2 m.​

Answer 1

Answer:

88,000 m²

Step-by-step explanation:

Radius of road roller= 140÷2 cm= 70 cm

Length of road roller= 2 m= 200 cm

Area covered by the road roller in a single revolution / Curved surface area

= 2πrh= 2×$\frac{22}{7}$× 70 × 200= 88,000 cm²

Therefore, area of road or area covered in 100 revs= 88,000 × 100= 88,00000 cm² = 88,000 m²

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