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20 July, 16:39

Two trains leave the same station at the same time

and travel in opposite directions. One train travels

at 80 kilometers per hour and the other at 100

kilometers per hour. In how many hours will they

be 900 kilometers apart?

2 hours

3 hours

4 hours

5 hours

+5
Answers (1)
  1. 20 July, 16:46
    0
    D. 5 hours

    Step-by-step explanation:

    rt=d

    rt+rt=900

    80t+100t=900

    180t=900

    18t=90

    2t=10

    t=5

    5 hours

    80*5+100*5=900
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