Round to the Nearest Tenth Unless Indicated Otherwise

Multiple Choice

Round to the nearest tenth unless indicated otherwise.
-At a fixed temperature, the resistance R of a wire varies directly as the length l and inversely as the square of its diameter d. If the resistance is 0.46 ohm when the diameter is 1 mm and the length is 230 cm, what is the
Resistance when the diameter is 2 mm and the length is 2170 cm?

A) 1.1 ohm
B) 542.5 ohm
C) 249.6 ohm
D) 2.2 ohm