Question

Скорость катера в стоячей воде 12км/ч ,а скорость течения реки 3км/ч.Определите путь катера против течения реки за 5 часов.

Answer 1

V катера = 12 км/ч
Vтечения =3 км
t= 5 часов
S-?
S= (Vкатера -Vтечения)*t
S= (12-3)*5=9*5=45 км
Ответ : S=45 км  -путь катера против течения за 5 часов.

Answer 2

Problem Analysis

To determine the distance traveled by a boat against the current of a river, we need to consider the speed of the boat and the speed of the current. In this case, the boat's speed in still water is given as 12 km/h, and the speed of the river's current is 3 km/h. We also know that the boat travels for 5 hours. We can use this information to calculate the distance traveled by the boat against the current.

Calculation

To calculate the distance traveled by the boat against the current, we need to subtract the speed of the current from the speed of the boat and then multiply the result by the time traveled.

The formula for calculating distance is:

Distance = (Boat's speed - Current's speed) × Time

Substituting the given values:

Distance = (12 km/h - 3 km/h) × 5 hours

Simplifying the equation:

Distance = 9 km/h × 5 hours

Distance = 45 km

Therefore, the boat will travel a distance of 45 kilometers against the current of the river in 5 hours.

Answer

The boat will travel a distance of 45 kilometers against the current of the river in 5 hours.