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A vessel initially contains 200 kg of wa...

A vessel initially contains 200 kg of water at `60^(@)C`. More water is supplied to the vessel from two taps. Temperature of water from the first tap is `80^(@)C` and that from the second tap is `20^(@)C`. Each tap supplies water at the rate of `"5kg. min"^(-1)`. After what time, will the temperature of water in the vessel be `55^(@)C`?

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