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Two liquids at temperatures 60^(@)Cand20...

Two liquids at temperatures `60^(@)Cand20^(@)C` respectively have masses in the ratio 3 : 4 and their specific heats in the ratio 4 : 5. If the two liquids are mixed, the resultant temperature is

A

`70^(@)C`

B

`50^(@)C`

C

`40^(@)C`

D

`35^(@)C`

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The correct Answer is:
D
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