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Steel bars, each of length 3.0 m at 28C, are to be used for constructing...

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Question 157
A
1.2 x 10-1cm
B
8.4 x 10-2cm
C
7.2 x10-2cm
D
3.6 x 10-2cm
E
1.8 x 10-2cm
Explanation
Gap L = L1 = 1.0 x 10-5 x 3 x (40 - 28)
= 3.6 x 10-2

Correct option: D

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