Question

Даю 41 балл Пароход, двигаясь против течения со скоростью 16 км/ч, проходит расстояние между двумя пристанями за 5 ч. За какое время он пройдёт то же расстояние по течению, если скорость парохода по течению равна 5,6 м/с?Ответ: время равно= ч. (Результат округляй до десятых!)​

Answer 1

Ответ:

Расстояние между пристанями = 5*16 = 80 км

5.6 м/с в км/ч = 5.6 * 3.6 = 20.16 км/ч

t = 80 / 20.16 = 3.96825396825 ч

округляем до десятых и получаеться 4.0 ч

Answer 2

Problem Analysis

We are given the following information: - The steamship is moving against the current with a speed of 16 km/h. - It takes 5 hours for the steamship to travel a certain distance between two piers. - We need to find the time it would take for the steamship to travel the same distance with the current, given that the speed of the steamship with the current is 5.6 m/s.

To solve this problem, we can use the formula: time = distance / speed.

Calculation

Let's calculate the time it would take for the steamship to travel the same distance with the current.

1. Convert the speed of the steamship against the current from km/h to m/s: - 16 km/h = 16 * (1000 m / 1 km) / (3600 s / 1 h) = 4.44 m/s.

2. Calculate the time it takes for the steamship to travel the distance against the current: - distance = speed * time - time = distance / speed - time = 5 hours = 5 * 3600 seconds = 18000 seconds - distance = speed * time = 4.44 m/s * 18000 s = 79920 meters.

3. Calculate the time it would take for the steamship to travel the same distance with the current: - speed with the current = 5.6 m/s - distance = 79920 meters - time = distance / speed = 79920 m / 5.6 m/s = 14271.43 seconds.

4. Round the time to the nearest tenth: - The time it would take for the steamship to travel the same distance with the current is approximately 14271.4 seconds.

Answer

The steamship would take approximately 14271.4 seconds to travel the same distance with the current, given that the speed of the steamship with the current is 5.6 m/s.