Question

A 150 pound person uses 6.6 calories per minute when walking at a speed of 4 mph. How long must the person walk at this speed to use at least 240 calories

Answer 1

The person must walk 36.36 minutes to use at least 240 calories.

Explanation:

Given:

A 150 pound person uses 6.6 calories per minute when walking at a speed of 4 mph.

Now, to find the time the person walk at this speed to use at least 240 calories.

As, given calories used per minute = 6.6.

So, to solve we use unitary method:

If 6.6 calories used in = 1 minute.

So, 1 calorie used in =
`(1)/(6.6)`

Thus, 240 calorie used in =
`(1)/(6.6) * 240`

=
`(1)/(6.6) * 240`

=
`(240)/(6.6)`

=
`36.36\ minutes.`

Therefore, the person must walk 36.36 minutes to use at least 240 calories.