How can I find an average speed of a car if it moves from point A To B at a speed of 30 kilometers per hour and returns at a speed of 50 kilometers per hour?
Md Ariful Islam
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Dr. Md Rushad Rahman
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Since you have two different speeds for half the distance (A to B = half; B to A = half), use the formula given in method 5: 2ab/a+b. So: (2)(30)(50)/30+50 3000/80 37.5 So, the average speed is 37.5 km/hr
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