Dewey Cheetem & Howe Electricity
Bill for 10th February to 10th April 2011
Mrs E Windsor, 1 The Mall, London
Reading last time
|
18366
|
Reading this time
|
19617
|
Units used
|
Cost at 8p per unit
| ||
Standing Charge
|
£5.50
| ||
Total
|
Fill in the empty boxes.
Why was the next bill less?
Mrs Windsor and her family went away to Scotland for the whole of the summer and use no electricity. Did she have no bill to pay?
PAYING FOR ELECTRICITY
Number of kWh= power (in kW) x time (in hours)
1000 w= 1 kW
Assume 1 kWh costs 8p
Calculate the cost of running
1. A 1 kW fire for 5 hours
2. A 4 kW immersion heater for 3 hours.
3. A 3kW oven for ½ hr.
4. A 2 kW kettle for 15 min
5. A 600 W TV for 5 hrs
6. A 240 W music system for 3 ½ hours.
7. A 50 W clock radio for 24 hours
8. A 1.5 W battery charger for 10 hours.
9. Six 100 W bulbs for 6 hours
10. Six 25W energy saving bulbs for 6 hours (one of these will replace a 100W bulb)
