Metal rods of length 20m each are laid end to end to form a bridge at 25oC. What gap will be provided between consecutive rails for the bridge to withstand 75oC?
[Linear expansivity of the material = 2.0 x 10-5K-1
a
0.20m
b
0.22m
c
0.25m
d
0.02m
Explanation
Correct Option
dVideo Explanation
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