Question

X

9.7.67
A 150-pound person uses 6.7 calories per minute when walking at a speed of 4 mph. How long must a person walk at this speed to use at least 190 calories?

Answer 1

Answer:
`28.35\ minutes`

Explanation:

Let be "x" the time in minutes a 150-pound person must walk at 4 mph to use at least 190 calories.

The amount of calories that a 150-pound person uses in 1 minute when walking at a speed of 4 mph is:

`Calories\ per\ minute=6.7`

Therefore, knowing this, we can write the following proportion:

`(1)/(6.7)=(x)/(190)`

Finally, we must solve for "x" in order to find its value.

Multiplying both sides of the equation by 190, we get this result:

`(190)((1)/(6.7))=((x)/(190))(190)\\\\x=28.35`