Two carnote engines A and B have their sources at 1000 K and 1100 K and their sinks are at 400 K and 500 K respectively. If `eta_(A)` and `eta_(B)` are their efficiencies,

Options

A. `eta_(A)lt eta_(B)`
B. `eta_(A)=eta_(B)`
C. `eta_(A)gteta_(B)`
D. Data is insufficient.

Answer

C

Explanation

`eta_(A)=1-(400)/(1000)=.60`
`eta_(B)=1-(500)/(1000)=.545`
`thereforeeta_(A)gteta_(B)`