The diameter of a roller is 168 cm and its length is 150 cm. It takes 500 complete revolutions to level the playground. Find the area of the playground in square meters.
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Answer:
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Radius of roller = 84 cm
Length = 150 cm
Roller will move along its curved surface area.
CAS = 2πrh
= 2× 22/7 × 84 × 150 cm²
= 79200 cm²
Therefore,area of covered by 500 revolutions
= 500 × 79200 cm²
= 39600000 cm²
Therefore, area of the playground in m²
= 39600000 / 10000 m²
= 3960 m²
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Hope it helps you mate ❤️
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