Round to the Nearest Tenth Unless Indicated Otherwise

Multiple Choice

Round to the nearest tenth unless indicated otherwise.
-The resistance of a wire varies directly as the length of the wire and inversely as the square of the diameter of the wire. A 20 foot length of wire with a diameter of 0.1 inch has a resistance of 3 ohms. What would the
Resistance be for a 25 foot length, with diameter 0.01 inch, of the same kind of wire ?

A) 368 ohms
B) 372.5 ohms
C) 375 ohms
D) 387 ohms