The electrical resistance r of a wire varies directly proportional
to its length L and inversely as the square of its diameter d:
r = K * L / d^2
Looking for L, we rearrange the equation:
L = r * d^2 / K
L = 2.5 * (85)^2 / 10.8
L = 1672.45 mil
1 foot is equivalent to 12,000 mil, therefore converting
the unit:
L = 1672.45 mil * (1 foot / 12000 mil)
L = 0.14 foot = 0.1 foot
