The diameter of a roller is 84cm and height is 120 cm. It completes 500 revolutions to cover full playground. Find the area of playgroung in meter square
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Answer:
1584 m²
Step-by-step explanation:
Given,
d = 84cm
r = d/2 = 42cm
l = 120 cm
T.S.A of cylinder = 2πrh
= 2 x 22/7 x 42 x 120
= 31680 cm²
Area levelled by 500 revolution = Area of playground
= 500 x 31680cm²
= 15840000 cm² [ change into m]
= 1584 m²
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