A lamp rated 60W and an electric iron rated 800W are used for 6 hours everyday. Calculate the total energy consumed in 30 days.

Explanation

`P_(1) 60 `W `" " P_(2) =800 W `
`E_(1) = 60xx6 " " E_(2) =800xx6`
=360 watt -hr `" "`=4800 watt -hr
Total energy consumed E = `E_(1)+E_(2)`
`=360 + 4800`
= 5160 watt-hour
Energy consumed in 30 days = `5160xx30`
`= 154800 ` watt- hour
=154.8 kWh.