NEED DETAILED HELP

Question

No clue and last tutor did not know it. .....The resistance (in ohms) of a circular conductor varies directly with the length of the conductor and inversely with the square of the radius of the conductor. If 50 feet of wire with a radius of 6*10^-3 inch has a resistance of 10 ohms, what would be the resistance of 100 feet of the same wire if the radius is increased to 7*10^-3 inch?

Answer 1

(resistance)(radius²) = k(length)

(10)(36*10^-6) = 50k

 

Solve for k

 

Substitute new values. Determine new resistance.