Two wires of the same material but of lengths in the ratio P \( 2: ...

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Two wires of the same material but of lengths in the ratio
P \( 2: 3 \) and diameters in the ratio of \( 3: 2 \) are stretched with
\( \mathrm{DV} \) equal force. Then the ratio of elongations produced is
a. \( 9: 4 \)
b. \( 1: 1 \)
c. \( 8: 27 \)
d. \( 9: 16 \)
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