Question

An electric cable contains a single copper wire of radius 9 mm. It's resistance is 5 12. This cable is
replaced by six insulated copper wires, each of radius 3 mm. The resultant resistance of cable will
be
(1) 7.52
(2) 452
(3) 90 22
(4) 270​

Answer 1

Explanation:

here is the answer...

(1) is the correct one...