A train travels some distance with a speed of 30km/hr and returns with a speed with a speed of 45km/hr. Calculate the average spped. Pls. Very URGENT!!. Thanks in advance
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Let's say the distance is x. Total distance will be 2x. Time for first trip = x/30 Time for second trip = x/45 Average speed = 2x/(x/30 + x/45) = 2x/(x/18) = 36 km/h
lalithabalaranjan:
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