Solve.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 0.48 ohm when the diameter is 1 mm and the length is 240 cm, what is the resistance when the diameter is 4 mm and the length is 2080 cm?
A. 130 ohms
B. 62.4 ohms
C. 0.26 ohms
D. 1.04 ohms
Answer: C
Mathematics
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