Q.

A uniform steel rope 400 metres long is hung vertically. The weight of the steel is 7.8 gm/cm3 and D = 2100 kg/mm2. The ratio of elongation of first 150 metres to that of first 300 metres would be

A. 1 ; 2
B. 1 ; 4
C. 2 ; 1
D. 4 ; 1
E. 16 ; 1
Answer» B. 1 ; 4
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