**(i) Calculate the electrical energy consumed by a 1200 W toaster in 30 minute. (ii) What will be … 1 month if one unit of…**

###### Answers:

(i) P = 1200 W t =30 min = 0.5 h

Electrical energy (E) =P x t = 1200 x 0.5

= 600W/h = 0.6 kWh.

(ii) Energy consumed is 30 days

= 0.6 x 30 = 18 kWh

Cost of using 18 units = 7 4 x 18 = 72