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An alumminium rod and steel wire of same...

An alumminium rod and steel wire of same length and cross-section are attached end to end. Then compound wire is hung fron a rigid support and load is suspended from the free end. Y for steel is `((20)/(7))` times of aluminium. The ratio of increase in length of steel wire to the aluminium wire is

A

`20 :3`

B

`10 :7`

C

`7 : 20`

D

`1 : 7`

Text Solution

Verified by Experts

The correct Answer is:
C
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