1.

The diameter of a roller is 84cm and its length is 120cm. it takes 500 complete revolutions to move once over a level playground, then the covered area in m square is a​

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The diameter of a roller is 84cm and its length is 120cm. it takes 500 complete revolutions to move once over a level playground, then the covered area in m SQUARE is a.

\large\red{\tt{\mathcal{ANSWER:}}}

Given:-

Diameter = 84cm

Radius = {\frac{84}{2} = 42cm

Length = 120cm

T.S.A of cylinder = 2πrh

= 2 x 22/7 x 42 x 120

= 31680 cm²

Area levelled by 500 revolution = Area of playground

=> 500 x 31680cm²

=> 15840000 cm²

Which is the REQUIRED answer.

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