Question

Задача . От дома до школы - 900 метров , Сколько времени займет дорога в школу , если 3 десатых этого расстояния идти со скоростью 90м\мин , а оставшуюся часть - со скоростью 70 м\мин?

Answer 1

1) 900*3:10=270(м)- первая часть пути
2)270:90=3(мин)-идти до первой части пути.
3)900-270=630(м)-вторая часть пути
4)630:70=9(мин)-идти до второй части пути
5)3+9=12(мин) идти до школы
ответ6 12 минут идти до школы

Answer 2

900мх0.3=270м
270м:90м\мин=3 мин
900м-270м=630м
630м:70м\мин=9мин
3мин+9мин=12мин
вот так примерно решение можно записать и по другому

Answer 3

Calculation of Time to Reach School

To calculate the time it will take to reach school, we need to determine the distance covered at each speed and then add the times together.

Given: - Distance from home to school: 900 meters - Speed for the first 3/10 of the distance: 90 m/min - Speed for the remaining distance: 70 m/min

Let's calculate the time it takes to cover each part of the distance:

1. Time taken to cover the first 3/10 of the distance at a speed of 90 m/min: - Distance: 3/10 * 900 meters = 270 meters - Speed: 90 m/min - Time = Distance / Speed = 270 meters / 90 m/min = 3 minutes

2. Time taken to cover the remaining distance at a speed of 70 m/min: - Distance: (1 - 3/10) * 900 meters = 630 meters - Speed: 70 m/min - Time = Distance / Speed = 630 meters / 70 m/min = 9 minutes

Now, let's add the times together to get the total time taken to reach school:

Total time = Time for the first part + Time for the second part = 3 minutes + 9 minutes = 12 minutes

Therefore, it will take 12 minutes to reach school.