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7 January, 15:11

A train travels 51 kilometers in 4 hours, and then 69 kilometers in 5 hours. What is its average speed?

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  1. 7 January, 15:30
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    add the mileage 51+69 = 120 km

    add the times 4+5=9 hours

    now divide the two

    120/9 = 13.3 km per hour average speed
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