A tap supplies water at 10°C and another tap at 100°C. How must hot water must be taken so that we get 20 kg water at 35°C ?

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7.2 kg

10 kg

5.6 kg

14.4 kg

answer is C.

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Detailed Solution

m(100 -35)x1 = (20-m) (35-10)x1or 65m= 500 - 25mor 90m = 500∴m=50090≈5.6kg

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