cuboid. Qu 2 The diameter of a
roller is 80 cm and length is 126
cm. It takes 750 complete
revolutions moving once over to
Level a playground. Find the area
of a playground.
*
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Answer:
Diameter of roller= 80cm
Radius of roller =40cm
Length/Height = 126cm
LSA of cylinder= 2πrh=2×22/7×40×126
= 31680cm²
Roller covers area in 1 revolution = 31680cm
Roller covers area in 750 revolutions= 750×31680
= 23760000cm
So Area of the playground=23760000cm²
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