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cost of levelling the ground at the rate of rupees 7 per sqm was rupees 32, 340 if 500 rotations of a road roller of length 2.1 m were needed them find the diameter of the roller used |
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Answer» Total cost for levelling = 32,340 rs Rate of levelling = 7 rs / m² Are LEVELLED = Total cost for levelling / Rate of levelling = 32340 / 7 = 4620 m² h = 2.1 m Area levelled = area covered by ROAD roller in 500 rotations 4620 = 500 x 2πrh 4620 = 500 x 2 x 22/7 x r x 2.1 4620 x 7 / (500 x 22 x 2 x 2.1) = r r = 7 / (10 x 3) d = 14 / (10 x 3) d = 0.47 m (APPROX) : Ans Hope I helped |
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