Question

Помогите решить задачу:Буратино живет на расстоянии 1км 200м от школы. Уроки в школе начинаются в 8 часов 30 мин. Буратино делает за минуту 120 шагов, длинна шага-40 см. В котором часу Буратино должен выходить из дома,чтобы приходить за 10 мин до начала занятий?

Answer 1

120000см-расстояние от школы до дома
120000/40=3000-количество шагов всего
3000/120=25мин-время за которое буратино проходит от дома до школы
8 часов 20мин - 25мин= 7ч 55мин-ответ

Answer 2

1200м=120000см
120000/40=3000 шагов ему нужно сделать
3000/120=25минут
значит должен выходить в 7 55

Answer 3

Problem Analysis

To solve this problem, we need to determine the time at which Buratino should leave his house in order to arrive at school 10 minutes before classes start. We are given that Buratino lives 1 kilometer 200 meters away from the school. We also know that Buratino takes 120 steps per minute, with each step measuring 40 centimeters.

Solution

To find the time Buratino should leave his house, we need to calculate the time it takes for him to walk from his house to the school and subtract 10 minutes from the start of classes.

1. Convert the distance from kilometers and meters to centimeters: - 1 kilometer = 1000 meters = 1000 * 100 centimeters = 100,000 centimeters - 200 meters = 200 * 100 centimeters = 20,000 centimeters - Total distance = 100,000 + 20,000 = 120,000 centimeters

2. Calculate the number of steps Buratino needs to take to cover the distance: - Each step is 40 centimeters long. - Number of steps = Total distance / Length of each step = 120,000 / 40 = 3,000 steps

3. Calculate the time it takes for Buratino to walk the distance: - Buratino takes 120 steps per minute. - Time in minutes = Number of steps / Steps per minute = 3,000 / 120 = 25 minutes

4. Subtract 10 minutes from the start of classes: - Start of classes: 8:30 AM - Time Buratino should leave his house = Start of classes - Time to walk - 10 minutes - Time Buratino should leave his house = 8:30 AM - 25 minutes - 10 minutes

Calculation

To calculate the time Buratino should leave his house, we need to subtract 25 minutes and 10 minutes from 8:30 AM.

8:30 AM - 25 minutes = 8:05 AM 8:05 AM - 10 minutes = 7:55 AM

Answer

Buratino should leave his house at 7:55 AM in order to arrive at school 10 minutes before classes start.