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A tap supplies water at 10degree Celsius and another tap at 100degree Celsius. How much hot water must be taken so that we get 20kg water at 35degree Celsius? A-7.2kg,b-10kg,c-5.6kg,d-19.9kg

Asked by Priyanka 14th November 2017, 8:10 AM

If  m1 kg of hot water and m2 kg of cold water are mixed to get 20kg water at 35ºC

The amount of heat released by the hot water by cooling =The amount of heat absorbed by the cold water to get heated

m1 x s (100ºC-35ºC) = mx s (10ºC-35ºC)

m1 = (m2 x 25) /65

but m+m2 = 20

Thus,

m1=5.6kg

Answered by Expert 15th December 2017, 11:58 AM
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