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At what temperature should the sink be m...

At what temperature should the sink be maintained to increase the efficiency by `10%`?

A

`77K`

B

`300K`

C

`300^(@)C`

D

`77^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
D
`eta'=30%, T_(2)=?, T_(1)= 500K`
As `eta=1 1-(T_(2))/(T_(1))`
`:. (T_(2))/(T_(1))= 1-eta= 1-(30)/(100)=7/10`
`T_(2)=7/10T_(1)=7/10xx500= 350K`
`T_(2)= 350-273= 77^(@)C`
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