SOLUTION: The average speed of a train running at a speed of 30km/hr during the 1st 100km, at 40km/hr during the 2nd 100km and at 50km/hr during the last 100 is ?

Question 986214: The average speed of a train running at a speed of 30km/hr during the 1st 100km, at 40km/hr during the 2nd 100km and at 50km/hr during the last 100 is ?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
RT=D relates rate, time, and distance.
Each distance covered is one term.

Total Time,

LCD is 3*4

hours

Total Distance,

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