Question

A 60W bulb is switched on for 5hr daily.if the cost of electricity is Rs3 per unit, calculate the bill for the month of april​

Answer 1

Answer:

Rs.27

Explanation:

Energy consumed by the bulb daily

=60W × 5h

=300 Wh

Energy consumed in the month of April is 300 Wh×30

=9000 Wh

=9 kWh

cost = 9 kWh×Rs.3

       = Rs.27

Answer 2

$\huge{\underline{\underline{\bf{Solution}}}}$

$\rule{200}{2}$

$\tt Given \begin{cases} \sf{Time taken = 5 \: Hrs} \\ \sf{Power \: of \: bulb = 60 \: w} \\ \sf{Cost \: per \: unit = 3 Rs.} \\ \sf{Number \: of \: days = 30} \end{cases}$

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{To \: Find :}}}}$

We have to find the bill in April month

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{Explanation :}}}}$

We know the formula to find the enegy

$\large{\star{\boxed{\sf{Energy = Power \times time}}}}$

_______________[Put Values]

$\sf{\mapsto Energy = 60 \times 5 \times 30} \\ \\ \sf{\mapsto Energy = 300 \times 30} \\ \\ \sf{\mapsto 9000 \: Wh} \\ \\ \bf{Converting \: into kWh} \\ \\ \sf{Energy = 9 \: kWh}$

$\large{\star{\boxed{\sf{Energy = 9 \: kWh}}}}$

$\rule{200}{2}$

$\large{\star{\boxed{\sf{Total \: cost = Energy \times cost \: per \: unit}}}}$

$\sf{\mapsto Total \: cost = 9 \times 3} \\ \\ \sf{\mapsto Total \: cost = 27 \: Rs.}$

$\therefore$ Bill for april month is ₹ 27.