Question

In Shravani's house there are four tubelight two fans and one television tubelight consumes 40 words of fan 80 words at a v hundred Watts if a tube light is used for 6 hours to fans for 10 hours and TV for 8 hours in a day find the cost of electric energy used in 30 days @ rupees 2 per unit​

Answer 1

Answer:

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Given 3 tube lights, two fans and a television.

1 tube light consumes power = 40 W

There fore ,3 tube lights consume power = 3 x 40 W= 120 W

3 tube lights are kept on for five hours. So, consumption of power by 3 tube lights.

= 5 x 120 W = 600 W-------(1)

1 fan consumes power = 80 W

Therefore, 2 fans consume power = 2 x 80 W= 160 W 2 fans are kept on for 12 hours. So, consumption of power by 2 fans.

= 12 x 160 W = 1920 W-----------(2)

TV draws power = 60 W

TV is kept on for 5 hours = 5 x 60 W = 300 W---------(3)

Therefore, In One day consumption of power = (1) + (2) + (3)

= 600 W + 1920 W + 300 W

= 2820 W = 2.820 KW

Therefore, Total consumption of power in 30 days at Rs. 3 per KW

= 2.820 x 30 x 3 = Rs. 253.80

Answer 2

Answer:

In a house, there are four tube lights two fans and one television tube light consumes 40W fan 80W and tv 100W if a tube light is used for 6 hours to fans for 10 hours and TV for 8 hours in a day, the cost of electric energy used in 30 days @ rupees 2 per unit​ 201.6 rupees

Explanation:

The number of tube lights  $=4$

power used by one tube light $=40W$

working time of tube light in a day $=6hrs$

in 30days it is $=30*6=180hrs$

total power consumption of tube light $=180*40*4=28800W$

The number of fans $=2$

power used by one fan $=80W$

working time of a fan in a day $=10hrs$

in 30days it is $=30*10=300hrs$

total power consumption of the fan  $=300*80*2=48000W$

The number of television $=1$

power used by one tube light $=100W$

working time of tube light in a day $=8hrs$

in 30days it is $=30*8=240hrs$

total power consumption of tube light $=240*100*1=24000W$

so the total power consumption of the home $=28800+48000+24000=100800W=100.8KW$

the rate per KW is $=2$

so the total rate $=2*100.8=201.6rs$