Question

Из пункта А в пункт В путешественник двигался со скоростью 20км/ч. Обратно вернулся со скоростью 30 км/ч. Найдите среднюю скорость.(решение +чертеж если можно) Помогите пожалуйста!

Answer 1

Находим среднее арифметическое: (20+30)/2=50/2=25км/ч
к сожалению чертёж не могу прелоставить:-(

Answer 2

Problem Analysis

To find the average speed of the traveler, we need to calculate the total distance traveled and the total time taken. The traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Solution

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is given by: time_AB = d / 20 The time taken to travel from point B to point A at a speed of 30 km/h is given by: time_BA = d / 30 The total distance traveled is the sum of the distances traveled from point A to point B and from point B to point A: total_distance = 2d

The total time taken is the sum of the time taken to travel from point A to point B and from point B to point A: total_time = time_AB + time_BA

To find the average speed, we divide the total distance by the total time: average_speed = total_distance / total_time

Let's calculate the average speed using the given information.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to travel from point A to point B at a speed of 20 km/h is: time_AB = d / 20

The time taken to travel from point B to point A at a speed of 30 km/h is: time_BA = d / 30

The total distance traveled is: total_distance = 2d

The total time taken is: total_time = time_AB + time_BA

The average speed is: average_speed = total_distance / total_time

Let's substitute the values and calculate the average speed.

Calculation

Given that the traveler moved from point A to point B at a speed of 20 km/h and returned from point B to point A at a speed of 30 km/h.

Let's assume the distance between point A and point B is d.

The time taken to