The resistance of wire is directly propr...

The resistance of wire is directly proprtional to its length and inversely proportional to the square of its radius .Two wires of same meterial having the same resistance and their radii are in the ratio `9:8` .If the length of the first wiere is 162 cm then , find the length of the other wire .

64 cm

12 cm

128 cm

132 cm

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