Physics, asked by simi0412, 10 months ago

there are two 60 Watt lamp and two 80 watt fans in a house.The lamps and fans run 5 hours daily.Find out the expense in a month if an unit of electricity cost Is 4/-.assume one month has 30 days.

I will mark as brainliest....​

Answers

Answered by Adwaitraghav
11

Answer:the answer is rs 1680

Explanation:

P= 2*60+3*80=280

Rs=280*30*5*4/1000=1680

Answered by SteffiPaul
1

Therefore the expense in a month is Rs. 84/-.

Given:

The power of the lamp = 60 Watt

The power of the fan = 80 Watt

The period at which both fan and lights = 5 hrs per day

Cost of electricity per unit = Rs. 4/-

Number of fans = 2

Number of lamps = 2

To Find:

The expense in a month.

Solution:

The given question can be solved as shown below.

Number of operating hours in a month = 5 × 30 = 150 hrs

Number of units of electricity consumed by 2 lamps = 60 × 150 = 9,000 = 9 KW-hr

Number of units of electricity consumed by 2 fans = 80 × 150 = 12,000 = 12 KW-hr

Total units of electricity consumed by 2 fans and 2 lamps = 9 + 12 = 21 KW-hr

Cost of electricity per month = Total electricity consumed × Unit cost

Cost of electricity per month = 21 × 4 = Rs. 84/-

Therefore the expense in a month is Rs. 84/-.

#SPJ2

Similar questions