Math
Math, 17.10.2019 22:00, Firdaus17f

Atrain travels a ditance of 63 km and then travels a distnce of 72 km at an average speed of 6 km more than its usual speed .it takes 3 hours to complete the total journey .find the usual speed

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Atrain travels a ditance of 63 km and then travels a distnce of 72 km at an average speed of 6 km mo...

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