7.0 x 1011Nm-2
7.5 x 1011Nm-2
8.5 x 1011Nm-2
9.0 x 1011Nm-2
Correct answer is B
Young's modulus = FA ÷ eL
= 208×10−7 ÷ 10−43
= 7.5 x 1011Nm-2
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