Question

Велосипедист і вершник рухаються назустріч один одному. Швидкість велосипедиста 20 км/год.а швидкість вершника - 16км/год. Як змінюється відстань між ними? З якою швидкістю змінюється відстань?

Answer 1

Відстань між ними зменшується зі швидкістю 20+16=36км/год

Answer 2

Calculation of Distance and Change in Distance:

To determine how the distance between the cyclist and the rider changes over time, we can use the formula:

Distance = Speed × Time

Let's assume that the initial distance between the cyclist and the rider is zero. We can calculate the time it takes for the distance between them to change by using the formula:

Time = Distance / Relative Speed

The relative speed is the difference between the speeds of the cyclist and the rider. In this case, the relative speed is 20 km/h (cyclist's speed) - 16 km/h (rider's speed) = 4 km/h.

Now, let's calculate the time it takes for the distance between them to change:

Time = Distance / 4 km/h

Since the cyclist and the rider are moving towards each other, the distance between them will decrease. Therefore, the rate at which the distance changes is equal to the relative speed, which is 4 km/h.

Answer:

The distance between the cyclist and the rider will decrease at a rate of 4 km/h.