The diameter of a roller is 98 cm, and its length are 140cm. It takes 800 complete
revolutions to move to level a playground. Find the area of the playground on sqm.
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Step-by-step explanation:
Radius = Distance/2=98/2=49
Area of Roller=2πrh=2×3.142×49×140=43108.25≈43108
Area of 1 revolution = 43108 cm^2
Area of 800 revolution =800×43108
Area of playground = 34486400×1/100×1/100^2=3448
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