Question 878598: How many minutes does it take to go 40 miles at a constant speed of 25 miles per hour Found 2 solutions by Jstrasner, MathTherapy:Answer by Jstrasner(112) (Show Source):
You can put this solution on YOUR website! Hello,
So for this problem we need to change the units in the question (miles per hour) to miles per minute, so we can solve for minutes.
So first we need to figure out how many minutes are in an hour.
There are 60 minutes in an hour.
Now we have to use a unit multiplier (you will see below):
25 miles/hour X 1 hour/60 minutes = 25 miles x hour / 1 hour x 60 minutes.
Since 1 hour is on the top and the bottom, they cancel each other out so you are left with:
25 miles/60 minutes.
Now we need to use division to find the regular rate per 1 minute:
25/60 = .41667
Therefore,
25 miles per hour is equal to .41667 miles per minute.
Now we have to use another unit multiplier to figure out the minutes:
40 miles X minutes / .41667 miles.
The miles on the top and bottom cancel each other out so we are left with:
(40) x minutes / .41667
Now we divide:
40/.41667 = 95.99923
So it takes 95.99923 minutes to go 40 miles at a constant speed of 25 miles per hour.
I hope this helps!
