The Heating Coil of a Hot Water Heater Has a Resistance

The heating coil of a hot water heater has a resistance of 25 Ω and operates at 220 V.How long a time is required to raise the temperature of 150kg of water from 25°C to 85°C? (The specific heat for water = 10³ cal/kg⋅°C and 1.0 cal = 4.186 J) .

A) 1.9 h
B) 7.7 h
C) 2.3 h
D) 5.4 h
E) ​0.9 h