Masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio 5:3:1

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Masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio 5:3:1.
The ratio of their electrical resistance is
#physics unfolded #neet physics #electric current #jee physics
#problems on resistance
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why did u do r1 by r3 and not r1 by r2

shreyasnair