A roller 150 cm long has diameter of 70 cm. To level a ground it takes 750 revolutions. Determine the cost of levelling the playground at the rate of 75 paise per sq. metre.
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Lateral surface area of roller=2*22/7*45*150=33m^2
Total area of playground=750*33=24750m^2
Total amount of money for levelling the playground=24750*.75/100=18562.5 Rupees
Total area of playground=750*33=24750m^2
Total amount of money for levelling the playground=24750*.75/100=18562.5 Rupees
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Answer:
Area of playground = 750 × CSA of roller
= 750 x 2 x 22x 35 x 150 =
7
750 x 33000 =
= 24750000 cm ^
=2 2475 m ^ 2
Cost of leveling
= 2475 x 0.75
Rs 1856.25
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