Question

Катер пройшов за течением 90км за деякий час, за той же час против течии 70 км. Яку видстань пропливе плид за этот же час

Answer 1

90-х=70+х
-х-х=70-90
-2х=-20
х=20/2
х=10
10км/час скорость течения
Сорость катера 90-10=80км/час

Answer 2

Problem Analysis

We are given that a boat traveled downstream at a speed of 90 km/h for a certain amount of time, and then traveled upstream at a speed of 70 km/h for the same amount of time. We need to find the distance the boat traveled in that same amount of time.

Solution

Let's assume that the time taken by the boat to travel downstream and upstream is the same. Let's call this time "t" hours.

When the boat is traveling downstream, it is moving in the same direction as the current. So the effective speed of the boat is the sum of its speed and the speed of the current. In this case, the effective speed is 90 km/h.

When the boat is traveling upstream, it is moving against the current. So the effective speed of the boat is the difference between its speed and the speed of the current. In this case, the effective speed is 70 km/h.

We know that distance = speed × time. Therefore, the distance traveled downstream is 90t km, and the distance traveled upstream is 70t km.

To find the total distance traveled in time "t", we can add the distances traveled downstream and upstream:

Total distance = Distance downstream + Distance upstream = 90t + 70t = 160t km

Therefore, the boat traveled a distance of 160t km in the same amount of time.

Answer

The boat traveled a distance of 160t km in the same amount of time.

Please let me know if you need any further clarification.