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[" 30."2" liters water at "27^(@)C" is h...

[" 30."2" liters water at "27^(@)C" is heated by a "1kW" heater in an "],[" open container.On an average heat is lost to surroundings "],[" at the rate "160J/s" .The time required for the temperature "],[" to reach "77^(@)C" is "],[[" (1) "8min20s," (2) "10min],[" (3) "7min," (4) "14min]]

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