From two points, the distance between which is 30 km, two pedestrians left in the opposite direction.

univerkov | January 12, 2021 | education

From two points, the distance between which is 30 km, two pedestrians left in the opposite direction. The speed of one of them is 5 km / h. Determine the speed of the other, if after 2 hours the distance between them is 54 km.

Let’s find how many kilometers the first pedestrian traveled in two hours:
5 * 2 = 10 km.
Let’s find how many kilometers the second pedestrian traveled in two hours:
54 – 30 – 10 = 14 km.
Let’s find the speed of the second pedestrian:
14/2 = 7 km / h.
Answer: the speed of the second pedestrian is 7 km / h.

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