1. Use the formulae of carnot efficiency. 2. Substitute efficiency value and temperature of source value. 3. Temperature of sink is easily founded. / @themechanicalengineerstheme You can follow us on Facebook (page) below is the link: / the-mechanic. . Can write to us: [email protected] Please Subscribe to our channel👍 Like, Comment and Share our videos. 👍 Thank you !!