Question

An electric iron draws a current of $15A$ from a $220V$ supply. What is the cost of using iron for $30\text{minutes}$ everyday for $15\text{days}$ if the cost of 1 unit is $Rs.2$?

• A. $Rs.49.5$
• B. $Rs.60$
• C. $Rs.40$
• D. $Rs.10$

Answer 1

The correct option is A $Rs.49.5$

Given:

$I=15A,V=220V,t=0.5\times 15=7.5hr$

Energy is:

$E=Pt=VIt$
$=220\times 15\times 7.5$
$=24.75kWhr$
Total cost $=24.75\times 2=Rs.49.50$