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
Algebra ->
Customizable Word Problem Solvers
-> Travel
-> 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
Log On
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.
------------
Avg speed of a round trip, or of 2 equal segments is
2*45*36/(45 + 36) = 3240/81
= 40 km/hr
--------------
Notice the distance is not relevant.