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Q.

Yield strength σy of mild steel is 3×108 Nm−2  The minimum area cross section of rope of mild steel required to lift a load of metric ton is

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a

33 cm2

b

3.3 m2

c

0.33 cm2

d

3.3 cm2

answer is C.

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Detailed Solution

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For not yielding A≥Mgσy⇒A≥103×103×108m2 ≥13×10−4m2

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