Q59
Single choice
Dunne a certain month. 20 percent of all the electricity used by a household was used by the water heater.
The cost per kilowatt-hour of the electricity used by the water heater was half the cost per kilowatt-hour of the rest of the electricity used.
For that month, the cost of the electricity used by the water heater was what traction of the cost of the electricity used by the household?
