Question

SOS! дорога между пунктами а и б состоит из- подъема и спуска а ее длина равна 18 турист прошел путь из а и б за 5 часов из которых подъем занял 2часа.С какой скоростью турист шел на подъеме если его скорость на спуске больше его скорости на подъеме на 2 км/ч

Answer 1

1) 5 - 2 = 3(ч) занял спуск.
2) 18/3 = 6км/ч -- скорость на спуске.
3) 6 - 2 = 4км/ч
Ответ: 4км/ч

Answer 2

Путь: 18 км
Время: На подъем:2 часа. На спуск: 3 часа
Скорость: На подъем:х. На спуск: х+2
2х+3(х+2)=18
2х+3х+6=18
5х=12
х=12/5
х=2,4
Ответ:2,4

Answer 3

Problem Analysis

The problem states that a tourist traveled a road between points A and B, which consists of an ascent and a descent. The total length of the road is 18 km. The tourist completed the journey from A to B in 5 hours, with the ascent taking 2 hours. The problem asks for the speed of the tourist during the ascent, given that the speed during the descent is 2 km/h faster than the speed during the ascent.

Solution

To find the speed of the tourist during the ascent, we need to calculate the distance traveled during the ascent and divide it by the time taken for the ascent.

Let's denote the speed during the ascent as V_a and the speed during the descent as V_d. We know that V_d = V_a + 2 km/h.

We also know that the total length of the road is 18 km and the ascent took 2 hours. Therefore, the distance traveled during the ascent is D_a = V_a * 2 km.

To find the distance traveled during the descent, we can subtract the distance traveled during the ascent from the total length of the road: D_d = 18 km - D_a.

We can also calculate the time taken for the descent by subtracting the time taken for the ascent from the total time: T_d = 5 hours - 2 hours.

Now, we can use the formula speed = distance / time to calculate the speed during the ascent.

Calculation

Let's calculate the speed during the ascent step by step:

1. Calculate the distance traveled during the ascent: - D_a = V_a * 2 km

2. Calculate the distance traveled during the descent: - D_d = 18 km - D_a

3. Calculate the time taken for the descent: - T_d = 5 hours - 2 hours

4. Calculate the speed during the ascent: - V_a = D_a / 2 km

Answer

The speed of the tourist during the ascent can be calculated using the above steps.