railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mechanics Kinematics and Kinetics Work Power and Energy
An electric heater is left on for 30 minutes. During this time it uses 1200 W of electric energy. The total cost of the electricity will be if electricity costs 7 paisa per kWhr
1
252 paisa
2
25200 paisa
3
4200 paisa
4
4.2 paisa