Question

Расстояние между 2 пристанями теплоход проходит за 2 ч 30 мин. Если скорость теплохода уменьшить на 6 км/ч, то на это же расстояние теплоход затратит 3ч 15 мин. Найдите скорость теплохода.

Answer 1

3 ч 15 мин - 2 ч 30 мин  =   45 мин

получим дробь 45 и 6 сокрашаем получаем 15 /  2 

это обозначает что теплоход идет 2 км за 15 мин

тоесть делим 2 ч 30 мин на 15 и получаем расстояние тоесть = 12 км.

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 Ну как?

Answer 2

Problem Analysis

We are given that a ship travels a certain distance between two ports in 2 hours and 30 minutes. If the ship's speed is reduced by 6 km/h, it takes 3 hours and 15 minutes to cover the same distance. We need to find the speed of the ship.

Solution

Let's assume the original speed of the ship is x km/h.

We can use the formula distance = speed × time to calculate the distance covered by the ship in both cases.

In the first case, the ship covers the distance in 2 hours and 30 minutes, which is equivalent to 2.5 hours. Therefore, the distance covered is 2.5x km.

In the second case, the ship covers the same distance in 3 hours and 15 minutes, which is equivalent to 3.25 hours. Therefore, the distance covered is 3.25(x - 6) km.

Since the distance covered is the same in both cases, we can equate the two expressions:

2.5x = 3.25(x - 6)

Now, let's solve this equation to find the value of x.

2.5x = 3.25x - 19.5

19.5 = 3.25x - 2.5x

19.5 = 0.75x

x = 19.5 / 0.75

x = 26

Therefore, the speed of the ship is 26 km/h.

Answer

The speed of the ship is 26 km/h.