The distance between two points A and B is 20 km. A pedestrian left point A at a speed of 4 km / h.

| September 30, 2021 | education

The distance between two points A and B is 20 km. A pedestrian left point A at a speed of 4 km / h. A cyclist left point B at the same time with him at a speed of 12 km / h. Determine after what time they will meet if the cyclist rides towards the pedestrian?

Let the time after which the pedestrian and the cyclist meet be x hours.

Using the formula S = V * t, where S is the distance, V is the speed, t is the time, you can write the pedestrian’s distance as 4x, and the cyclist’s distance as 12x.

Since, according to the condition, it is given that the distance between two points A and B is 20 km, then we can draw up an equation and, having solved it, find the time:

4x + 12x = 20

16x = 20

x = 20: 16

x = 1.25 hours

Answer: a pedestrian and a cyclist will meet in 1.25 hours



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