Mathematics, 14.07.2019 10:30, toogie

Atrain travels 68 km at an average speed of 51 km/h. it then travels another 20 km at an average speed of 40 km/h before reaching its destination. calculate the average speed for the whole journey. also give the solution of this problem.

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Atrain travels 68 km at an average speed of 51 km/h. it then travels another 20 km at an average spe...

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