236Multiple Choice Questions (MCQs)10. A roller is 120 cm long and has – InterviewSolution

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1.	236Multiple Choice Questions (MCQs)10. A roller is 120 cm long and has diameter 84 cm.If it takes 500 complete revolutions to level aplayground, determine the cost of levelling it athe rate of30 paise per m2. \| Ď =-
Answer» Surface area of on revolution = 2∏rh= 2 x 22/ 7 x 60 x 84now for 500 revolution = 2 x 22/7 x 60 x 84 x 500=1584 m2now cost leveling 1 m2 = Rs. 0.30= for 1584 m2 = 0.30 x 1584 = Rs. 475 . 20

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