alleryA car runs 5 miles per kilowatt-hour. How many watt-hours does it use per mile?
A5
B200
C20
D500
Answer & Solution
Correct answer: B. 200
1. 1 kWh = 1000 Wh.
2. The inverse rate is 1/5 kWh per mile.
3. 1000 / 5 = 200 Wh per mile.
_Source: Wikipedia, Rate (mathematics), Properties and examples_
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