Question

The resistance of a wire is proportional to its length and inversely proportional to the square of its radius. Two
wires of the same material have the same resistance and their radii are in the ratio 9: 8. If the length of the
wire with the bigger radius is 162 cm, then find the length of the other.
a) 144 cm
b) 72 cm
c) 128 cm
d) 64 cm

Answer 1

Answer:

answer is 128 cm

Step-by-step explanation:

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