Question

Фёдор каждый день ходит в школу, преодолевая расстояние 1600 м за 20минут. Но в пятницу он был слишком сонным, шёл медленнее и первые 25% пути он прошёл за 8 минут. С какой скоростью ему надо идти дальше, чтобы не опоздать в школу?

Answer 1

Ответ:  100  м/ мин.

Пошаговое объяснение:

1)

1600*25/100=400м  Федор прошел за 8 минут.

2)

400:8=50 м/миин.  скорость Федора в пятницу за первую часть пути.

3)

1600/20=80 м/мин. -скорость Федора в обычный день.

4)

1600-400=1200м -остаток пути в пятницу.

5)

20-8=12 минут осталось Федору ,чтобы дойти до школы.

6)

1200:12=100 м/мин.-скорость Федора ,с которой он должен идти ,чтобы не опоздать в школу.

Answer 2

Problem Analysis

Fedor normally walks a distance of 1600 meters to school in 20 minutes. However, on Friday, he was feeling sleepy and walked slower. He covered the first 25% of the distance in 8 minutes. We need to calculate the speed at which he should continue walking in order to not be late for school.

Calculation

To find the speed at which Fedor should continue walking, we can use the formula:

Speed = Distance / Time

Let's calculate the remaining distance and time based on the given information:

- Total distance: 1600 meters - Total time: 20 minutes - Distance covered in the first 25%: 1600 meters * 0.25 = 400 meters - Time taken to cover the first 25%: 8 minutes

To find the remaining distance, we subtract the distance covered in the first 25% from the total distance:

Remaining distance = Total distance - Distance covered in the first 25% = 1600 meters - 400 meters = 1200 meters

To find the remaining time, we subtract the time taken to cover the first 25% from the total time:

Remaining time = Total time - Time taken to cover the first 25% = 20 minutes - 8 minutes = 12 minutes

Now we can calculate the speed at which Fedor should continue walking:

Speed = Remaining distance / Remaining time = 1200 meters / 12 minutes

Answer

Fedor should continue walking at a speed of 100 meters per minute in order to not be late for school.