the diameter of a 120 cm long roller is 84 cm It takes 1000 complete revolutions in moving once over to level a playground what is the area of the playground
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➪ Length of roller = 120 cm.
➪ Diameter of roller = 84 cm.
➪ Radius of roller = (Diameter)/2
= 42 cm
As we know, a roller is in the shape of cylinder.
➪Perimeter of roller = Area covered by roller in 1 one revolution = 2 × π × (radius ) × length
2 *22/7× 42 × 120
➪Perimeter = 44 × 6 × 120
➪Perimeter = 31,680 cm²
Therefore,
➪Area covered by wheel in 1000 revolutions
= (31,680×1000) cm²
31,680,000/1000 cm^2
31680 cm^2
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