An electric kettle takes 4a current at 220v

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An electric kettle takes a 4A current at 220V . How much time will it take to boil 1kg of water from temperature 20degrees C? The temperature of boiling water is 100degrees C.

1- 4.2min 2- 6.3 min
3- 8.4 min 4- 12.6 min

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