plz anwer i will mark as brainlest
explaination should be step by step
Answers
Answer:
Energy used by light bulbs in one day = 40w*5*4 = 0.8 kwh
Energy used by tube lights in one day = 60w*5*4 = 1.2 kwh
Energy used by TV in one day = 100 w*6 = 0.6kwh
Energy used by washing machine in one day = 400w*3 = 1.2 kwh
Total energy used in one day = 0.8 + 0.6 + 1.2 + 1.2 = 3.8 kwh
Total energy used in 30 days ( because April has 30 days) = 3.8 x 30 = 114 kwh
1 kwh = 1 unit
Cost per unit = Rs 1.8
So the bill for the entire month is 205.2 (114 x 1.8)
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Answer:
₹ 638.
Explanation:
Calculation for 1 day-
a) Given,
Power of 1 bulb= 40W.
No. of hours used= 4hrs.
No. of bulbs= 5.
[Formula: Energy= Power * Time]
∴ Energy used by 1 bulb = 40W * 4hrs. = 160 Whr.
∴Energy used by 5 bulbs = 160 Whr. *5 =800 Whr. = 0.8 KWh. -(1)
b) Similarly,
Given,
Power of 1 fan= 100W.
No. of hours used= 2hrs.
No. of fans=3.
[Formula: Energy= Power * Time]
∴ Energy used by 1 fan = 100W * 2hrs. = 200 Whr.
∴ Energy used by 3 fans = 200 Whr. * 3 =600 Whr. = 0.6 KWh. -(2)
c) Similarly,
Given,
Power of 1 heater= 1.5 KW.
No. of hours used= 2hrs.
No. of fan =1.
[Formula: Energy= Power * Time]
∴ Energy used by 1 fan = 1.5 KW * 2hrs. = 3 KWh -(3)
So, by equation 1, 2 and 3-
Total Energy consumed= (3 + 0.6 + 0.8) = 4.4 KWh.
[Conversion: 1 Kilowatt-Hour (kWh) = 1 unit]
Given, Charge per Unit= ₹5.
∴ Charge for all appliances for 1 day= ?5 * 4.4 = ?22.
Now, as 2016 was a leap year, so it's February month has 29 days.
∴Calculation for 29 days = ₹22 * 29 = ₹638.
Answer.