Question

A room has a 60watt, a 100watt and a 150watt light bulbs. How much energy is

used in all the lamps for 2.5hr per day?​

Answer 1

Answer:

0.775 kWh energy is used per day

Explanation:

energy = power x time

=> energy (1st bulb) = 60 x 2.5 Wh = 150 Wh

and energy (2nd bulb) = 100 x 2.5 Wh = 250 Wh

and energy (3rd bulb) = 150 x 2.5 Wh = 375 Wh

=> total energy consumption per day = 775 Wh = 0.775 kWh