InterviewSolution
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InterviewSolution
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a sphere of diameter 6.0cm is moulded into a thin uniform wire of diameter 0.2mm calculate the length of the wire in metres [take pie =22/7] . pliz kindly help |
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Answer» of sphere = 4/3 x pi x r^3=4/3 x 22/7 x 3 x 3 x 3=4 x 22/7 x 3 x 3 (3 gets cancelled out)= (88 x 9)/7=113.14cm^2 approx.Volume of wire = pi x r^2 x h (h is TAKEN as length of wire) = Volume of sphere= 22/7 x 0.01 x 0.01 x h = 113.14cm^2= 0.0022/7 x h = 792/7 (taken as FRACTIONAL FORM for EASE of calculation)= pi x 0.001 x h = 792/7= 0.001h = 792/7 x 7/22 (reciprocal of pi)= h = 36/0.001= h = 3600mm / 3.6m |
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