Sean walk 3/4 of a mile in 15 minutes. At that same pace, how far, in miles, can Sean walk in 1 hour and 20 minutes?

To calculate how far Sean can walk in 1 hour and 20 minutes, we can use the concept of proportions.

First, we need to calculate the number of minutes in 1 hour and 20 minutes. Since there are 60 minutes in 1 hour, we can multiply the number of hours (1) by 60 and then add the extra 20 minutes:

1 hour × 60 minutes/hour + 20 minutes = 60 minutes + 20 minutes = 80 minutes

Now, we can set up a proportion to find the distance Sean can walk in 80 minutes using the information given:

3/4 mile ÷ 15 minutes = x miles ÷ 80 minutes

To solve for x, we can cross-multiply and solve for x:

(3/4) × 80 minutes = 15 minutes × x miles
240/4 = 15x
60 = 15x

Now, divide both sides of the equation by 15 to isolate x:

60 ÷ 15 = 15x ÷ 15
4 = x

Therefore, Sean can walk 4 miles in 1 hour and 20 minutes, at the same pace.

(3/4) / 15 = x / 80

15x = 60

x = 4