Question

A radio set of 60 watts runs for 50 hours.How many units (kwh)of electrical energy are consumed

Answer 1

Total energy consumed in 50hours= 50×60 =3000w=3kw

We know 1kWh = 1 unit

So unit of energy consumed= 3kWh= 3units

Hope it helps.

Answer 2

$\sf\underline\pink{Solution:-}$

Given :-

Power (p) = 60 Watts

$\implies{\sf{ \cancel{ \dfrac{60}{1000} }}}$

$\implies \sf\blue{ 0.06 \:kW}$

Time (t) = 50 h

Formula :-

${\boxed{\sf{Power = \dfrac{Energy\: consumed}{Time\:Taken} }}}$

➞ 0.06 kW = $\sf{ \dfrac{Energy\:Consumed}{50\:h} }$

So,

Energy Consumed = 0.06 kW × 50 h

➞ 3 kWh

Thus,

The Electrical Energy consumed is 3 kWh ( 3 units).