Question

A 25-year-old woman burns 550t cal/hr while walking on her treadmill. How many calories are

burned after walking for 3 hours?

Answer 1

1650 calories

Explanation:

You want to know how many calories are burned in 3 hours of walking if 550 calories are burned each hour of walking.

Total

The total number of calories burned is the product of the number burned per hour and the number of hours:

(550 cal/h)·(3 h) = 550·3 cal = 1650 cal

The woman burned 1650 calories after walking 3 hours.

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Additional comment

As with most rate problems, the quantity is the product of the rate and the time.

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