three resistances 2R, 3R, 6R of same material and same length having area of cross section in ratio
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Explanation:
p is equal » same material
l is equal » given
Therefore , A1 : A2 : A3 = 1/2R : 1/ 3R : 1/ 6R
= 3/6 : 2/6 : 1/6
= 3 : 2 : 1
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