The diameter of roller is 84 cm and it’s length is 120 cm It takes 300 complete revolutions to level the playground . Find the area of playground in m square
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radius of the roller=42cm
c.s.a. of the roller=2πrh
2*22/7*42*120
44*6*120=264*120=31,680cm²
area of playground=31680*300=9,504,000cm²
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