Across-country team is doing a drill where they run for 30 minutes. one student jogs for 20 minutes at a pace of 6 miles per hour, then pushes it and runs for 9 miles per hour for the rest of the drill.

if you want to know total distance traveled then

20mins at known speed and ? mins at known speed

30-20=10 so

20mns at 6mph and 10mins at 9mph

convert miles per hour to miles per minute

6mph=6mi/1hr=6mi/60mins=1mi/10mins=0.1mi/min

9mph=9mi/1hr=9mi/60mins=3mi/20mins

20mins at 6mph

distance=speed*time=20min*0.1mi/min=2mi

10 mins at 9mph

distance=speed*time=10min*3mi/20min=30/20mi=1.5mi

total is 2+1.5=3.5mi run during that 30 min duration

30 Mins

Step-by-step explanation: