Question

Катер против течения реки за 2 часа проплыл 36 км. какой путь проплывет катер за 4,5 часа по течению реки если скорость течения реки 2,8км час?

Answer 1

36:2=18 км/ч скорость катера против течения
18+2,8=20,8 км/ч собственная скорость катера
20,8+2,8=23,6 км/ч скорость катера по течению
23,6*4,5=106,2 км - ответ

Answer 2

Calculation of Boat's Speed and Distance Traveled

To calculate the distance the boat will travel in 4.5 hours with the river's current, we can use the formula: distance = speed × time.

First, let's calculate the boat's speed in still water using the given information.

Given: - Boat's speed against the current = 36 km in 2 hours - Speed of the river's current = 2.8 km/h

The boat's speed in still water can be calculated using the formula: boat's speed in still water = (boat's speed against the current + speed of the river's current).

Using the given values: boat's speed in still water = (36 km / 2 h) + 2.8 km/h.

This gives us the boat's speed in still water.

Calculation of Distance Traveled with the River's Current

Now that we have the boat's speed in still water, we can calculate the distance the boat will travel in 4.5 hours with the river's current.

Using the formula distance = speed × time, where: - Speed = (boat's speed in still water + speed of the river's current) - Time = 4.5 hours

We can substitute the values and calculate the distance the boat will travel in 4.5 hours with the river's current.

Let's proceed with the calculations.