67.2k views
5 votes
A cross-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.

2 Answers

3 votes

Answer:

30 Mins

Explanation:

User Deepak Negi
by
8.1k points
6 votes

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

User Satbir
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories