Question

The track at bronwyn’s school is 1/4 mile around. If she can do 3 laps in 4 1/2 minutes, how fat is she running in miles per hour

Answer 1

10 mph

Explanation:

Find the average speed:

1/4 mile / lap 3 laps 3/4 mile 3/4 mile 3 miles

-------------------- * ------------- = ------------------ = --------------- = ----------------

1 4.5 min 4 2/4 min 18/4 min 18 min

Now mult. this result by the conversion factor 60 min / 1 hr = 1:

1 mile 60 min

----------- * -------------- = 10 mph

6 min 1 hr