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Railway lines are laid with gaps to allo...

Railway lines are laid with gaps to allow for expansion. If the gap between the steel rails 66 m long be 3.63 cm at `10^(@) C`. Then the temperature at which the lines touch (coefficient of linear expansion for steel `= 11 xx 10^(-6)^(@) C^(-1)` ) is

A

`40^(@) C`

B

`60^(@) C`

C

`70^(@) C`

D

`80^(@) C`

Text Solution

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The correct Answer is:
B
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