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An iron boiler of mass 180 kg contains 560 kg of water at 20âC . A heater supplies energy at the rate of 9.2Ã104 kJ/h.

Part A:

How long does it take for the water to reach the boiling point? 

Express your answer using two significant figures.

Part B:

How long does it take for the water to all have changed to steam (including the time to reach the boiling point)?

Express your answer using two significant figures.

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