a wire of lengh 2meter has a resistance of 4 ohms,obtain the resistance if specific resistance is doubled,diameter is doubled,and the lengh is made three times of the first.plsss help me!

Answer 1

the resistance is directly proportional to
... length and specific resistance

it is inversely proportional to the cross sectional area
... (square of the diameter)

4Ω * (2P / P) * (d / 2d)^2 * (3L / L)