Calculate the cost of seeing 2 movies on colour T.V. daily for the month of September.
Given wattage of colour T.V. = 60 W, duration each movie is 2 hours 30 min and 1kWh costs Rs.
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Answers
Answer:
the answer is 36 rs. for the whole month of September
cost per day= 1.2 rs.
days = 30
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Given - Power, time and cost per unit
Find - Total cost
Solution - Duration of 1 movie = 2 hours 30 minutes
As per the known fact, 60 minutes= 1 hour. So, 30 minutes = 0.5 hours.
Duration of 1 movie = 2.5 hours
Duration of 2 movies = 2.5*2
Duration of 2 movies = 5 hours
The month of September has 30 days.
Total hours of watching movies = 30*5
Total hours of watching movies = 150 hours
Total energy consumption = Power*time
Total energy consumption = 60*150
Total energy consumption = 9000 Wh
As per the known fact, 1000 Wh = 1 kWh
So, 9000 Wh = 9 kWh
Cost of 1 kWh = Rs. 12
Cost of 9 kWh = 12*9
Cost of 9 kWh = Rupees 108
Hence, the cost of watching 2 movies as per the given information is Rupees 108.