1.5 kg of water at 20°C will be heated to 90°C in a teapot with a 1500 Watt electric heater. The teapot weighs 0.75 kg and has an average specific heat of 0.8 kJ/kg°C. Consider the specific heat of the water to be 4.18 kJ/kg°C. Determine how long it will take to heat the water, assuming no heat loss from the teapot also, assume that the properties of both water and teapot remain constant during the heating process.