Question

please solve this question..
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Answer 1

Answer:

21%

Explanation:

let the original length be l

area be a

resistance R = ¶ l/a

new length L1 = l+10% of l = 1.1l

area A1 = a/1.1

new resistance R1 = ¶ L1/A1 = ¶ 1.1l/a/1.1

R1 = ¶ 1.21 l/a

R1 = 1.21 R ( since R = ¶ l/a)

%change = R1-R/R × 100

= 1.21R - R/R × 100

= 0.21R/R × 100

= 0.21 × 100

= 21%

Answer 2

Answer:

Option A i.e 21% is the correct option

Explanation:

hope it helps uh