The diameter of a roller is 84cm & its length is 120 cm it takes 500 complete revolutions to move once over to level a playground find the area of the playground in m²
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Diameter of the roller = 84 cm
It's radius = 42 cm. ...(D/2 = R)
Given Length = 120 cm
The Curved Surface Area of the roller = 2 πrh
= 2 × 22/7 * 42 * 120
= 31,680 cm ^2
Let the area of the playground be X.
X/31680 = 500
X = 500 * 31680
X = 15840000 cm ^2
Therefore the area of the playground in m^2 is 1,58,40,000/100, which is equal to 1,58,400 m^2
It's radius = 42 cm. ...(D/2 = R)
Given Length = 120 cm
The Curved Surface Area of the roller = 2 πrh
= 2 × 22/7 * 42 * 120
= 31,680 cm ^2
Let the area of the playground be X.
X/31680 = 500
X = 500 * 31680
X = 15840000 cm ^2
Therefore the area of the playground in m^2 is 1,58,40,000/100, which is equal to 1,58,400 m^2
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3
here is ur answer mate...........
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