the diameter of a roller is 84 and it's lenth is 120 it takes 500 complete revolution to move once over to level a play ground find the area of the playground
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Step-by-step explanation:
according to question
the diameter of a roller =84cm
radius of a roller=half diameter
radius of a roller=42cm
length of a roller=120cm
height of a roller=length of a roller
hence, height of a roller=120cm
lateral surface area of cylinder=2πrh
=2x22/7x42x120=31680cm^2
it takes 500complete revolution=31680x500=15840000cm^2
number of revolution=area of field
hence, area of field=15840000cm^2
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here is ur answer.........
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