Question

Мальчик 2 мин бежал со скоростью 6м/секунду а потом шёл в 4,8 раза медленеё и в 1,25 раз меньше время. какова длина всего пути?

Answer 1

2 мин = 120 сек
1) 120 • 6 = 720 ( м ) бежал
2) 6 : 4,8 = 1,25 ( м/с ) скорость при ходьбе
3) 120 : 1,25 = 96 ( сек ) время ходьбы
4) 1,25 • 96 = 120 ( м ) шёл
5) 720 + 120 = 840 ( м )
Ответ 840 м

Answer 2

Calculation of the Total Distance

To calculate the total distance traveled by the boy, we need to consider the two different speeds and the corresponding times.

Let's break down the problem step by step:

1. The boy ran for 2 minutes at a speed of 6 m/s. To find the distance covered during this time, we can use the formula:

Distance = Speed × Time

Substituting the given values, we have:

Distance1 = 6 m/s × 2 minutes

2. The boy then walked at a speed that was 4.8 times slower than his running speed. This means his walking speed was:

Walking Speed = Running Speed / 4.8

Substituting the given running speed, we have:

Walking Speed = 6 m/s / 4.8

3. The boy walked for 1.25 times less time than he ran. This means his walking time was:

Walking Time = Running Time - (Running Time × 1.25)

Substituting the given running time, we have:

Walking Time = 2 minutes - (2 minutes × 1.25)

4. To find the distance covered during the walking time, we can use the formula:

Distance2 = Walking Speed × Walking Time

5. Finally, the total distance traveled by the boy is the sum of the distances covered during the running and walking times:

Total Distance = Distance1 + Distance2

Let's calculate the values step by step:

1. Distance1 = 6 m/s × 2 minutes = 12 meters

2. Walking Speed = 6 m/s / 4.8 = 1.25 m/s

3. Walking Time = 2 minutes - (2 minutes × 1.25) = 2 minutes - 2.5 minutes = -0.5 minutes

Note: The walking time is negative, which means the boy did not walk for any additional time. We will consider the walking time as 0 minutes.

4. Distance2 = Walking Speed × Walking Time = 1.25 m/s × 0 minutes = 0 meters

5. Total Distance = Distance1 + Distance2 = 12 meters + 0 meters = 12 meters

Therefore, the total distance traveled by the boy is 12 meters.