The diameter of a roller is 84 cm and its length is 120cm. it takes 500 complete revolutions to move once over to level a playground. find the area of the playground.
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Answer:
1584 sq m
Step-by-step explanation:
Given,
Diameter = d = 84 cm
Radius = r = d/2 = 84/2 = 42 cm
Length = Height = h = 120 cm
No. of rounds = 500
CSA of the roller = 2πrh
= 2 (22/7) (42) (120)
= 44 (720)
= 31680 sq cm
Area of the playground = no. of rounds * CSA of roller
= 500 * 31680
= 15840000 sq cm
= 1584 sq m
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