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An electric heater is rated at 120 volts, 1000 watts and is used to boil water. Calculate the time in minutes to raise the temperature

An electric heater is rated at 120 volts, 1000 watts and is used to boil water. Calculate the time in minutes to raise the temperature of 1 liter of water from 15C to boiling. The heater has an over-all efficiency of 92%.

A. 6.4 minutes

B. 5.4 minutes

C. 4.4 minutes

D. 3.4 minutes PROVIDE ME CLEAR EXPLANATION

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