Question

Катер имеющий собственную скорость 15 км час , проплыл 2 ч по течению реки и 3 ч против течения . какое растояние проплыл катер за всё время если скорость течения реки 2 км ч ?

Answer 1

15+2=17 км/ч скорость катера по течению 
17*2=34 км прошёл катер по течению
15-2=13  км/ч скорость катера против течения
13*3=39 км прошёл катер против течения
34+39=73 км прошёл катер 
Заранее спасибо за класс

Answer 2

Problem Analysis

We are given the following information: - The speed of the boat is 15 km/h. - The boat traveled downstream for 2 hours. - The boat traveled upstream for 3 hours. - The speed of the river's current is 2 km/h.

We need to find the total distance traveled by the boat.

Solution

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

Let's calculate the distance traveled downstream and upstream separately.

1. Distance traveled downstream: - Speed of the boat = 15 km/h - Time = 2 hours - Speed of the river's current = 2 km/h

The effective speed of the boat downstream is the sum of the boat's speed and the river's current speed: 15 km/h + 2 km/h = 17 km/h.

Using the formula, the distance traveled downstream is: 17 km/h x 2 hours = 34 km.

2. Distance traveled upstream: - Speed of the boat = 15 km/h - Time = 3 hours - Speed of the river's current = 2 km/h

The effective speed of the boat upstream is the difference between the boat's speed and the river's current speed: 15 km/h - 2 km/h = 13 km/h.

Using the formula, the distance traveled upstream is: 13 km/h x 3 hours = 39 km.

Now, let's calculate the total distance traveled by the boat.

The total distance traveled is the sum of the distance traveled downstream and the distance traveled upstream: 34 km + 39 km = 73 km.

Therefore, the boat traveled a total distance of 73 km.

Answer

The boat traveled a total distance of 73 km.