SOLUTION: A train covered x km at 45 kmph & then another x km at 36 kmph. Find the average speed of the train in covering the entire journey. A)40 kmph B)38 kmph

Question 838691: A train covered x km at 45 kmph & then another x km at 36 kmph. Find the average speed of the train in covering the entire journey.
A)40 kmph
B)38 kmph
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A train covered x km at 45 kmph & then another x km at 36 kmph. Find the average speed of the train in covering the entire journey.
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Avg speed of a round trip, or of 2 equal segments is
2*45*36/(45 + 36) = 3240/81
= 40 km/hr
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Notice the distance is not relevant.
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