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A barometer with brass scale, which is c...

A barometer with brass scale, which is correct at `0^(@)C`, reads 75.000 сm on a day when the air temperature is `20^(@)C`. Calculate correct reading at `0^(@)C`. (Coefficient of real expansion of mercury = `0.00018//^(@)C` and coefficient of linear expansion of brass = `0.0000189//""^(@)C`.)

A

`74.758` cm

B

`75.748` cm

C

`74.825` cm

D

`75.847` cm

Text Solution

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The correct Answer is:
A
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