SOLUTION: a car goes from town A to another town B with a speed of 40km/hr and returns back to the same town at a speed of 60km/hr . calculate the average speed of the car

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Question 758419: a car goes from town A to another town B with a speed of 40km/hr and returns back to the same town at a speed of 60km/hr . calculate the average speed of the car
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
a car goes from town A to another town B with a speed of 40km/hr and returns back to the same town at a speed of 60km/hr . calculate the average speed of the car
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let x=distance between town A and town B
ave speed=distance/travel time=2x/travel time
travel time=distance/speed
x%2F40%2Bx%2F60=%2860x%2B40x%29%2F2400=100x%2F2400
2x%2F%28100x%2F2400%29=2x%2A2400%2F100x=48
ave speed=48 km/hr