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Two wires A and B are made of same material having ratio of lengths 3 1 L L B A = and their diameters ratio B A d d = 2. If both the wires are stretched using same force, what would be the ratio of their respective elongations?

1. 1 : 3
2. 1 : 6
3. 1 : 12
4. 3 : 4

Correct answer: 1 : 12

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