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Distance between two places is 200km. al...

Distance between two places is `200km`. `alpha` of metal is `2.5 xx 10^(-5//@)C`. Total spece that must be left between steel rails to allow a change of temperature from `36^(0)F` to `117^(0)F` is

A

`2.25km`

B

`0.225km`

C

`22.5km`

D

`0.0225km`

Text Solution

Verified by Experts

The correct Answer is:
B
`l_(2) - l_(1) = l_(1)alphaDeltat`
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