Question

the diameter of a roller is 84 cm and its length is 1.2 m. it takes 500 complete revolutions to once over the level ground find the area of playground in m^2



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Answer 1

Given:

Height =120cm, R= 84/2

=42 cm

⇒CSA=2πrh=2×22/7 ×42×120cm²

=31680 cm²

⇒Area =500×CSA

=500×31680 cm²

=15480000cm²

=15840000/10000 m²

=1548 m²

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Answer 2

Answer:

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