Solve the Problem

question 238

Multiple Choice

Solve the problem. 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 0.8 ohm when the diameter is 1 mm and the length is
200 cm, what is the resistance when the diameter is 2 mm and the length is 1050 cm?

• A) 210.0 ohm
• B) 262.5 ohm
• C) 1.1 ohm
• D) 2.1 ohm

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