An electrical heater is used to melt a block of ice, mass 1.5kg. If the heater is powered by a 12V battery, and a current of 20A flows through the coil, calculate the time taken to melt the block of ice at 0°C. (specific latent heat of fusion of ice = 336 x 10³J/kg)

• A.76.0min
• B.35.0min
• C.21.0min
• D.2.9min