Question

An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours
at $3 per unit.
[Ans. 15.000)
​

Answer 1

Answer:

ans is 15

Explanation:

Given,

Power of kettle, p = 2.5 kw

Voltage, V = 250 v

Time, t = 2 h

As, Energy, E = P × t = 2.5 × 2 = 5 kwh

Cost per unit of energy = Rs. 3

Cost for 5 kwh of energy = 3 × 5 = Rs. 15

hope this helps you