An electric washing machine consumes 1100 watts per hour.The company charges ₹13.75 for each kilowatt hour
(a).What does it cost to wash clothes for a week,if the washing machine is used on an average for 2.5 hours everyday?
(b) How many hours would a 500 watt ironing press be used continuously to consume electricity worth ₹38.50?
Answers
(a) Cost to wash clothes for a week,if the washing machine is used on an average for 2.5 hours everyday is Rs. 264.6875
(b) Hours that a 500 watt ironing press would be used continuously to consume electricity worth ₹38.50 is 5.6 hours
Step-by-step explanation:
Given
Washing machine consumes 1100 watts per hour
Charges = 13.75 Rs. per hour
(a) If the washing machine is used for 2.5 hours everyday
Then in 1 week (= 7 days) total hours, the machine was in operation = 2.5 × 7 = 17.5 hours
Total electricity consumed = 1100 × 17.5 = 19250 watt = 19.25 kW
Total cost to wash the clothes = 19.25 × 13.75 Rs. = 264.6875 Rs.
(b) Electricity consumed worth = 38.50 Rs.
Electricity consumed in kW-hour = 38.5/13.75 = 2.8 kW-hour = 2800 Watts-hour
No. of hours, the ironing press was used = 2800/500 = 5.6 hours
Hope this answer is helpful.
Know More:
Q: A washing machine rated 300W is operated for one hour/day.if the cost of unit is Rs.3.00 find the cost of the energy to operate a washing machine for the month of march .
Click Here: https://brainly.in/question/1965699
Given:
- An electric washing machine consumes 1100 watts per hour.The company charges ₹13.75 for each kilowatt hour.
To Find:
- What does it cost to wash clothes for a week,if the washing machine is used on an average for 2.5 hours everyday?
- How many hours would a 500 watt ironing press be used continuously to consume electricity worth ₹38.50?
Solution:
(i)
We know the cost per hour = 13.75
No.of watts per hour = 1.1 kilo watts
→ So, cost per day = 2.5×1.1×13.75
→ 37.8125
Now, cost per week =
→ 37.8125 × 7
→ Rs.264.6875
(ii)
→ Watts per hour = 0.5 kilowatts
→ Cost = 38.50
Now,
→ Time = 38.50/0.5
→ Time = 77 hours