Answer:
168 minutes or 2 hrs. 48 minutes
Explanation:
The first part of the problem is just stating that x and y are proportional. This means that Beau goes a certain amount of miles for every minute. One way to solve this problem is to find out how much the constant of proportionality is (finding out how long 1 mile would take), and then multiplying that by 8. The other but easier way (according to me) is to make an equation. The proportional equation you have to make is:
5 miles/ 105 minute
8 miles/ x minutes
In this situation, x is the unknown amount of minutes it would take Beau to ride is his canoe for 8 miles.
Then you cross multiply, getting 5x = 105*8.
Next, you multiply 105 by 8 to get 840.
Lastly, divide that by 5 to get 168 minutes.
Here are 2 handy dandy methods to solve proportionality-typed problems.