Mathematics

Brianna Nelson

21 May, 20:14

A child built a toy rail road 5 meters long. He also bought two trains which run on batteries. Unfortunately he ran out of batteries and had to get batteries from other toys. After the batteries' installation the first train could run 30cm/s and the second train only 10cm/s. He made the trains run toward each other. In how many seconds the trains will meet

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