Question

A microwave oven needs 240 V of electricity to operate and draws 5 A current. How much does it cost per month (30 days) if it operates 30 minutes per day and TNB char RM 0.95 cents per kWh?

Answer 1

cost per month = power*time*char

$=240\cdot5\cdot10^{-3}\cdot0.5\cdot30\cdot0.95=\$17.1$