PhysicsQuantity of heatWAEC
200 g of water at 80 °C is mixed with 300 g of water at 30 °C. Find the final temperature if no heat is lost.
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Answer: C. 50 °C
200(80 − θ) = 300(θ − 30) gives 16 000 + 9000 = 500θ, so θ = 50 °C.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.