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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