diameter of roller is 80cm and it's length is 126cm .It takes 750 complete revolutions moving once over to level playground.Find area of playground.
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Given that it is a playground, a more reasonable unit of measurement will be in meters, therefore converting the units to m:
80 cm = 0.8m
126 cm = 1.26m
Find the area covered by 1 revolution:
Area = 2πrh
Area = 2π(0.8)(1.26) = 6.336 m²
Find the area covered by 750 revolution:
1 revolution = 6.336 m²
750 revolutions = 6.336 x 750 = 4752 m²
Answer: The area of the playground is 4752 m²
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