Question

Sarah is currently spending $100 per month on electricity. She pays $0.20 per kWh. Her space heater is responsible for 10 percent of her electricity consumption. How many kilowatt-hours does her space heater use in a month? Assume a month is 30 days. * a) 0.07 kWh b) kWh c) 20 kWh d) 50 kWh

Answer 1

Answer: 50 kWh per month

Explanation: 100(1/0.20)=500 kWh per month —> 500kwh(0.10)=50kwh per month

Answer 2

Space heater consumption (kWh) = 50 kWh

Step-by-step explanation:

Given:

Total spending on electricity = $100 per month

Rate of electricity = $0.20 per kWh

Space heater consumption = 10% of total electricity

Find:

Space heater consumption (kWh)

Computation:

Total electricity consumption = $100 / 0.20

Total electricity consumption = 500 kWh

Space heater consumption (kWh) = [Total electricity consumption][10% of total electricity]

Space heater consumption (kWh) = [500][10%]

Space heater consumption (kWh) = 50 kWh