In a household, the following appliances are used on a particular day:
(i) one refrigerator rated 300 W running for 12 h,
(ii) two ceiling fans each rated 80 W running for 15 h, and
(iii) a water pump rated 1.2 kW running for 45 min.
Ignoring standby consumption, find the total electrical energy consumed by these appliances that day.
a) 7.2kWh
b) 8.4kWh
c) 6.9kWh
d) 6.5kWh