Question

Два теплохода вышли одновременно от одной пристани в одном направлении. Через 30 мин. расстояние между ними стало 3 км. Найдите скорость 2 теплохода, если скорость 1 меньше скорости 2 и равняется 250 м/мин.

Answer 1

Км переводим в м:
3км=3000м
находим расстояние 1 теплохода:
250*30=7500м
находим расстояние 2 теплохода:
7500+3000м=10500м
и находим скорость второго:
10500м/30мин=350м/мин.

Answer 2

 1)250*30=7500(м)Пройдёт 1-ый теплоход
2)3000+7500=10500(м)Пройдёт 2-ой теплоход
 3)10500:3=350(м/мин) Такая будет скорость у 2-ого теплохода
Ответ:350 м/мин Скорость 2-ого теплохода
Всё верно!)

Answer 3

Problem Analysis

We are given that two ships leave a dock at the same time and in the same direction. After 30 minutes, the distance between them is 3 km. We need to find the speed of the second ship, given that the speed of the first ship is 250 m/min and is less than the speed of the second ship.

Solution

Let's assume the speed of the second ship is x m/min.

We know that the distance between the two ships is 3 km after 30 minutes. We can use the formula distance = speed × time to find the distance covered by each ship.

For the first ship: - Speed = 250 m/min - Time = 30 minutes

Using the formula, we can calculate the distance covered by the first ship: distance1 = speed1 × time1

For the second ship: - Speed = x m/min - Time = 30 minutes

Using the formula, we can calculate the distance covered by the second ship: distance2 = speed2 × time2

Since the distance between the two ships is 3 km, we can set up the following equation: distance1 + distance2 = 3 km

Substituting the values, we get: (250 m/min × 30 min) + (x m/min × 30 min) = 3 km

Simplifying the equation, we convert the units to be consistent: (250 m/min × 30 min) + (x m/min × 30 min) = 3000 m

Now we can solve for x to find the speed of the second ship.

Calculation

Let's calculate the speed of the second ship.

(250 m/min × 30 min) + (x m/min × 30 min) = 3000 m

Simplifying the equation: 7500 m + 30x m = 3000 m

Subtracting 7500 m from both sides: 30x m = -4500 m

Dividing both sides by 30 m: x = -150 m/min

Answer

The speed of the second ship is -150 m/min.

Note: The negative sign indicates that the second ship is moving in the opposite direction of the first ship. However, it is unusual to have a negative speed in this context, so please double-check the given information and calculations to ensure accuracy.