What length of wire is, question a particular wire has a resistivity of 29 x 10-8, Physics

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What length of wire is

Question: A particular wire has a resistivity of 2.9 x 10^-8 Ω•m and a cross-sectional area of 3.5 x 10^-6 m². A length of this wire is to be used as a resistor that will receive 49 W of power when connected across a 20-V battery.

Question 1: What length of wire is required?

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Please help for the above question, totally confused!! Show each steps if possible, Thanks.

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Physics: What length of wire is

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