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Two exactly similar wires of steel and copper are stretched by equal force. If the total elongation is 2 cm, then how much is the elongation in steel and copper wire respectively? Given, `Y_("steel")=20xx10^(11)"dyne/cm"^(2),Y_("copper")=12xx10^(11)"Dyne/cm"^(2)`

A

`1.25cm, 0.75cm`

B

`0.75cm, 1.25cm`

C

`1.15cm, 0.85cm`

D

`0.5cm, 1.15cm`

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The correct Answer is:
B
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