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?

Question

asked Oct 1, 2020 227k views

1 Answer

Ivelin · Answer 1 · 2020-10-07T03:50:28+0000

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:

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