Question

Из портов,расстояние между которыми 24 км,в противоположных направлениях вышли в путь два корабля.Первый корабль вышел в путь на 3 часа раньше второго.После того как второй корабль проплыл 64 км,расстояние между ними было 228 км.Найдите скорость первого корабля,если скорость второго 32 км/ч. Помогите пожалуйста!СРОЧНО!!!

Answer 1

И так, если скорость 2 32 км, значит он уже едет 2 часа.

1) 64/32 = 2 часа 

Если первый вышел в путь на 3 ч раньше, а тот уже едет 2 часа, значит всего 5 ч. но сначала нужно вычесть расстояние между 2 портами.

2) 228 - 24 = 204 (км) 

Далее убираем то число, сколько проехал 2 корабль

3) 204 - 64 = 140 (км)

Теперь вычисляем скорость, если время - 5 часов, а всего он проехал - 140

4) 140/5 = 28(км/ч)

Ответ: 28 км/ч - скорость первого корабля.

ЕСЛИ НЕ ПРАВИЛЬНО - НЕ РУГАААТЬ

Answer 2

Problem Analysis

We have two ships that start from ports that are 24 km apart in opposite directions. The first ship starts 3 hours earlier than the second ship. After the second ship has traveled 64 km, the distance between the two ships is 228 km. We need to find the speed of the first ship, given that the speed of the second ship is 32 km/h.

Solution

Let's assume the speed of the first ship is v km/h. Since the second ship starts 3 hours later, it has been traveling for 3 hours less than the first ship when the distance between them is 228 km.

To find the time it took for the second ship to travel 64 km, we can use the formula:

time = distance / speed

For the second ship, the time is 64 km / 32 km/h = 2 hours.

Now, let's calculate the time it took for the first ship to travel the same distance of 64 km. Since the first ship started 3 hours earlier, the total time it took for the first ship to travel 64 km is (2 + 3) hours = 5 hours.

We can use the formula:

distance = speed * time

For the first ship, the distance is 64 km and the time is 5 hours. Therefore, we can calculate the speed of the first ship as:

v = distance / time = 64 km / 5 hours = 12.8 km/h

So, the speed of the first ship is 12.8 km/h.

Answer

The speed of the first ship is 12.8 km/h.

Verification

To verify the solution, we can calculate the distance between the two ships after the second ship has traveled 64 km using the given speeds.

The second ship travels at a speed of 32 km/h for 2 hours, covering a distance of 64 km. The first ship travels at a speed of 12.8 km/h for 5 hours, covering a distance of 64 km as well.

After the second ship has traveled 64 km, the distance between the two ships is 228 km, as given in the problem. Therefore, the solution is correct.