Question

Блог Андрей Тимофеев Меню пользователя Мастер (1048) Решите задачку по физике? Путешественник преодолел 240 км за 10 часов. Первую половину пути он ехал на автомобиле,а вторую-на слоне. С какой скоростью он ехал на слоне, если скорость автомобиля в 4 раза больше слона?

Answer 1

4х+х=240/10

5х=24 следовательно х=4,8 скорость слона

скорость авто 4,8*4=19,2
 

Answer 2

Формула времени - S/V. За х берем скорость слона, скорость машины 4х, на каждом виде транспорта он прошел по 120км. Решаем уравнением через время 120/4х + 120/х = 10, умножаем обе части на 4, получаем 120/х +480/х = 40, дальше 600/х = 40, х=15км/ч. 

Answer 3

Problem Analysis

To solve this problem, we need to determine the speed at which the traveler rode the elephant. We are given that the traveler covered a total distance of 240 km in 10 hours. The first half of the distance was covered by car, while the second half was covered by elephant. Additionally, we are told that the car's speed is 4 times greater than the elephant's speed.

Solution

Let's denote the speed of the elephant as x km/h. Since the car's speed is 4 times greater than the elephant's speed, the car's speed can be represented as 4x km/h.

We know that the traveler covered a total distance of 240 km in 10 hours. The first half of the distance, which is 120 km, was covered by car, and the second half, also 120 km, was covered by elephant.

To find the speed of the elephant, we can set up the following equation:

Distance covered by car / Speed of car + Distance covered by elephant / Speed of elephant = Total time

Substituting the given values, we get:

120 km / (4x km/h) + 120 km / (x km/h) = 10 hours

Simplifying the equation, we have:

30 / x + 120 / x = 10

Combining the fractions, we get:

(30 + 120) / x = 10

Simplifying further, we have:

150 / x = 10

To solve for x, we can cross-multiply:

150 = 10x

Dividing both sides by 10, we find:

x = 15

Therefore, the speed of the elephant is 15 km/h.

Answer

The traveler rode the elephant at a speed of 15 km/h.