An electric appliance of rating 300 W is used 5 hours per day in the month of March. Find the number of units consumed.

Explanation

Data : P=300W, t=`5("hours")/("day")xx31` days
`=155` hours, 1 unit=1 kW`*h` =1000 `W *h`
`N=(Pt)/(1000 W*h//"unit")=(300W xx 155 "hours")/(1000 W*h//"unit")`
=46.5 units
46.5 units are consumed in the month of March.