A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The 

extension in the rod was 1 mm only. If Esteel = 2 × 106

 kg/cm2

, the side of the rod, is 

(A) 1 cm 

(B) 1.5 cm 

(C) 2 cm 

(D) 2.5 cm 

1 Answer

Answer :

(C) 2 cm 

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