Which consume more energy a heater of 500W operated for 10 sec or a tv of 100W operated for 30 sec​

Which uses more energy, a 250 W TV set in 1 h or a 1200 W toaster in 10 minutes ?

A refrigerator having a power rating of 350W operates for 10 hours a day. Calculate the cost of electrical energy to operate if for a month of 30 days. The rate of electrical energy is Rs. 340 per kWh.

Who will spend more electrical energy ? 500 W TV set in 30 minutes, or 600 W heater in 20 minutes ?