Question

Реши задачу. В полдень от пристани отошел пароход со скоростью 16 км/ч Через 3 ч от той же пристани в том же направлении отошел второй пароход и через 12 ч после выхода догнал первый пароход. Найди скорость второго парохода. Спасибо за Решение.

Answer 1

1)12+3=15(ч.)-всего времени
2)16*15=240(км)-расстояние
3)240:12=20(км\ч)-скорость второго парохода.

Answer 2

Problem Analysis

We are given two steamboats that depart from the same dock. The first steamboat has a speed of 16 km/h, and the second steamboat departs 3 hours later in the same direction. After 12 hours, the second steamboat catches up to the first steamboat. We need to find the speed of the second steamboat.

Solution

Let's assume the speed of the second steamboat is x km/h.

The first steamboat travels for 12 hours at a speed of 16 km/h, covering a distance of 12 * 16 = 192 km.

The second steamboat travels for 12 - 3 = 9 hours at a speed of x km/h, covering a distance of 9 * x = 9x km.

Since the second steamboat catches up to the first steamboat, the distance covered by both steamboats is the same. Therefore, we can set up the equation:

192 = 9x

To find the value of x, we can divide both sides of the equation by 9:

192/9 = x

Simplifying the equation:

x = 21.33 km/h

Therefore, the speed of the second steamboat is approximately 21.33 km/h.

Answer

The speed of the second steamboat is approximately 21.33 km/h.