Question 906000: A car tests a new engine by traveling a straight course a distance of 3000 meters. During the first half of the course, the car averages a speed of 20 m/s, and during the second half of the course, the car averages a speed of 30 m/s. What is the car's average speed for the entire course?
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! A car tests a new engine by traveling a straight course a distance of 3000 meters. During the first half of the course, the car averages a speed of 20 m/s, and during the second half of the course, the car averages a speed of 30 m/s. What is the car's average speed for the entire course?
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average speed=distance/travel time
travel time=distance/speed
=1500/20+1500/30
=75+50=125 s
What is the car's average speed for the entire course? 3000/125=24 m/s
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