A car covers the first half of the distance between two places at a speed of 40km/h and the second half at 600km/h. What is the average speed of the car.
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A car covers the first half of the distance between two places at a speed of 40km/h and the second half at 600km/h. What is the average speed of the car.
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Answer:
Explanation:Let the total distance be x km.
According to 1 condition.
Distance=x/2
Speed=40km/h
Time=Distance/speed
=x/2÷40=x/80
According to 2 condition.
Distance=x/2
Speed=60km/h
Time=x/2÷60=x/120
Now, Avg speed = total distance/Total time
Total distance=x
Total time=x/80+x/120
=5x/240
Avg speed=x/5x/240
=48km/h
Hope this will helps you.