Question

Three bodies of the same material and having masses m, m and 3m are at temperatures 40°C , 50°C and 60°C, respectively. If the bodies are brought in thermal contact, the final temperature will be

Answer 1

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Suppose the final temprature is T.

ms(T−40)+ms(T−50)=3ms(60−T)

⇒(T−40)+(T−50)=180−3T⇒5T=270

⇒T=540 C

Answer 2

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Suppose the final temprature is T.

ms(T−40)+ms(T−50)=3ms(60−T)

⇒(T−40)+(T−50)=180−3T

⇒5T=270

⇒T=540 C