Two tanks A and B contain water at 30oC and 80oC respectively. Calculate the amount of water that must be taken from each tank to prepare 40 kg of water at 50oC.

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24 kg, 16 kg

16 kg, 24 kg

20 kg, 20kg

30 kg, 10 kg

answer is A.

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Detailed Solution

m1×1×(50−30)=m2×1×(80−50) or m1×20=m2×30 or m1m2=32Mass of water from tank A=35×40=24kgMass of water from tank B=25×40=16kg

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