Responses (2)
I mean in a race though.:)
A conversion factor is a fraction equal to 1. You are given that one hour equals 60 minutes so you can write that as hr/60min=1 or 60min/hr=1 whichever works for you and drop it into an equation anywhere and it only changes the units.
ANSWER = You write this first so it looks like you know what you are doing. That gives you a bit of time to figure out what to do next. You could go to the effort to convert 46:07 to seconds or minutes, but since you asked for an estimate I am going to drop the seconds.
ANSWER = 46min/7mi x 0.62mi/k x 5k
Ok, now we check everything. This is called sanity check and it is especially important in chemistry and physics where you might have a dozen or so conversions in a single equation. We have min above the fraction line so that appears in the answer. We have mi below the line and again above so that cancels. We have k below the line and again above so that cancels. When you are sure everything is right, multiply all the numbers above the line and divide by all the numbers below.
ANSWER = 46min/7mi x 0.62mi/k x 5k = 20.37 min
Check: 5k x 0.62 = 3.1 mi and 3.1/7 x 46min = 20.37 min
Maybe I should have posted my essay on rulers, since I did the check with fractions and it only tool about three seconds to do it.
5 kilometers so little over 3 miles so like 3.11 miles