Question

An air cooler rated 600 W is operated for 7 full days. What is the cost of the energy to operate it at Rs.2.50 per kWh?

Answer 1

Answer:-

• Power=P=600W
• Time=t=7days=168hours

We know

$\boxed{\sf E=Pt}$

$\\ \sf\longmapsto E=600\times 168$

$\\ \sf\longmapsto E=100800Wh$

$\\ \sf\longmapsto E=0.1\times 10^6wh$

$\\ \sf\longmapsto E=1\times 10^2units$

$\\ \sf\longmapsto E=100units$

• Bill per unit=2.5

$\\ \sf\longmapsto Bill=100\times 2.5$

$\\ \sf\longmapsto Bill=Rs250$