Question

Скорость катера в стоячей воде равна 12 километров в час а скорость течения реки 3 километров час Определите скорость катера по течению реки скорость катера против течения реки путь катера против течения за 3 ч реки за 5 часов

Answer 1

Скорость катера по течению = 12+3=15 км/ч
скорость катера против течения=12-3=9 км/ч
путь против течения за  3 часа s=vt=9*3=27 км
путь против течения за 5 ч  = 9*5=45 км/ч

Answer 2

Problem Analysis

We are given the speed of a boat in still water and the speed of the river current. We need to determine the speed of the boat with the current, the speed of the boat against the current, and the distance traveled by the boat against the current in 3 hours and by the river in 5 hours.

Solution

To solve this problem, we can use the following formulas:

1. Speed of the boat with the current = Speed of the boat in still water + Speed of the river current. 2. Speed of the boat against the current = Speed of the boat in still water - Speed of the river current. 3. Distance traveled by the boat against the current = Speed of the boat against the current × Time. 4. Distance traveled by the river = Speed of the river current × Time.

Let's calculate the values step by step.

Calculation

Given: - Speed of the boat in still water = 12 kilometers per hour. - Speed of the river current = 3 kilometers per hour. - Time = 3 hours (for the distance traveled by the boat against the current) and 5 hours (for the distance traveled by the river).

1. Speed of the boat with the current: - Speed of the boat with the current = Speed of the boat in still water + Speed of the river current. - Speed of the boat with the current = 12 + 3 = 15 kilometers per hour. (Source:

2. Speed of the boat against the current: - Speed of the boat against the current = Speed of the boat in still water - Speed of the river current. - Speed of the boat against the current = 12 - 3 = 9 kilometers per hour.

3. Distance traveled by the boat against the current: - Distance = Speed × Time. - Distance traveled by the boat against the current = Speed of the boat against the current × Time. - Distance traveled by the boat against the current = 9 × 3 = 27 kilometers.

4. Distance traveled by the river: - Distance traveled by the river = Speed of the river current × Time. - Distance traveled by the river = 3 × 5 = 15 kilometers.

Summary

Based on the given information, we have calculated the following values: - Speed of the boat with the current = 15 kilometers per hour. - Speed of the boat against the current = 9 kilometers per hour. - Distance traveled by the boat against the current in 3 hours = 27 kilometers. - Distance traveled by the river in 5 hours = 15 kilometers.

Please let me know if I can help you with anything else.