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 0.87 ohm when the diameter is 1 mm and the length is 290 cm, what is the resistance when the diameter is 2 mm and the length is 1500 cm?
A. 1.125 ohms
B. 375 ohms
C. 326.25 ohms
D. 2.25 ohms
Answer: A
Mathematics
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