A heater of resistance $110\Omega$ is immersed in a bucket containing $5$ liter of water at $0^\circ C$ . What is the temperature of water if the heater is kept on for $20$ min using a $220\ V$ mains? (Specific heat of water is $4.2 \mathrm{~J} \cdot g^{\circ} \mathrm{C}^{-1}$ ).

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