A heat engine has an efficiency of 1 6 . When the temperature of sink is reduced by 62 ° C , its efficiency get doubled. The temperature of the source is :

Step-by-step solution

η = 1 - T L T H ......(i) 2 η = 1 - T L - 62 T H = 1 - T L T H + 62   T H ⇒ η = 62   T H ⇒ 1 6 = 62   T H ⇒ T H = 6 × 62 = 372   K In C ∘ ⇒ 372 - 273 = 99 ° C