An electric iron of 1100 W is operated for 2 hours daily. What will be the electrical consumption expenses for that in the month of April ? (The electric company charges Rs. 5 per unit of energy.)

Answer

The expense of using iron for 2 hr daily in the month of April is Rs 330.

Explanation

`"Given: Power (P)=1100 W = 1.1 kW,"`
Time (t) = 2 hour
To find:`" "` Expense of using electric iron in April month
`"Formulae: i. Energy"="Power"xx"time"`
`" ii. Electrical consumption expenses "="Energy consumed "xx"charge per unit"`
`"Calculation: From formula (i),"`
Energy consumed in one day
`=1.1xx2=2.2kWh`
`therefore" "` Energy consumed in the month of April (i.e. 30 days) will be,
`"Energy "=2.2xx30=66kWh="66 unit ..."(because "1 kWh = 1 unit")`
From formula (ii),
Electrical consumption expenses
`=66xx5="Rs 330"`