contestada

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

Respuesta :

altavistard

Answer:

10 mph

Step-by-step 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

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