The masses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is

Q. The masses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is

(a) 1 : 3 : 5

(b) 5 : 3 : 1

(c) 1 : 15 : 125

(d) 125 : 15 : 1

Ans: (d)