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The Diameter Of A Wire Is About Three Times Of Wire B. If Wire A, Which Is 150-cm Long Has A Resistance Of 10 Ohms, What Is The Resistance Of A 400 Cm Wire B. - Math Discussion

The diameter of a wire is about three times of wire b. If wire A, which is 150-cm long has a resistance of 10 ohms, what is the resistance of a 400 cm wire b.