Question

Две моторные лодки в 2 часа дня отошли от причала на озере в противоположных направления скорость первого лодке 28 км час через 30 минут расстояние между ними было 26 км 500 м найди скорость второй лодке

Answer 1

S = v * t - формула пути
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S = 26 км 500 м = 26,5 км - расстояние
t = 30 мин = 30/60 ч = 1/2 ч = 0,5 ч - время в пути
х - скорость второй лодки
v = х + 28 (км/ч) - скорость удаления
Подставляем значения в формулу и решаем уравнение:
(х + 28) * 0,5 = 26,5
х + 28 = 26,5 : 0,5
х + 28 = 53
х = 53 - 28
х = 25
Ответ: 25 км/ч.

2 способ (по действиям).
1) 28 * 0,5 = 14 (км) - прошла первая лодка за 0,5 ч;
2) 26,5 - 14 = 12,5 (км) - прошла вторая лодка за 0,5 ч;
3) 12,5 : 0,5 = 25 (км/ч) - скорость второй лодки.

Answer 2

28км/ч*30 мин=14 км ( прошла 1 лодка)

26км 500 м- 14 км=12 км 500 м ( прошла 2 лодка)

12км 500 м * 30 мин=25 км/ч ( скорость 2 лодки)

Answer 3

Problem Analysis

We are given that two motorboats departed from a pier on a lake in opposite directions at 2:00 PM. The speed of the first boat is 28 km/h. After 30 minutes, the distance between the two boats was 26 km 500 m. We need to find the speed of the second boat.

Solution

Let's break down the problem step by step to find the solution.

1. Convert the distance between the two boats from km and m to a single unit (meters). 2. Convert the time difference between the two boats to hours. 3. Use the formula `speed = distance / time` to find the speed of the second boat.

Let's calculate the solution using the given information.

Calculation

1. Convert the distance between the two boats to meters: - 26 km = 26,000 m - 500 m (already in meters) - Total distance = 26,000 m + 500 m = 26,500 m

2. Convert the time difference between the two boats to hours: - 30 minutes = 0.5 hours

3. Use the formula `speed = distance / time` to find the speed of the second boat: - Speed of the first boat = 28 km/h - Distance between the two boats = 26,500 m - Time difference = 0.5 hours - Speed of the second boat = Distance between the two boats / Time difference

Let's calculate the speed of the second boat: - Speed of the second boat = 26,500 m / 0.5 h = 53,000 m/h

Answer

The speed of the second boat is 53,000 m/h.

Please note that the given information is limited, and there may be additional factors or constraints that could affect the accuracy of the solution.