Question

Коля готовил уроки 2 часа. На математику он потратил 1/3 этого времени, на географию — 1/4 оставшегося после приготовления математики, а на написание сочинения по русскому языку остальное время. Сколько минут Коля потратил на приготовление уроков по математике, географии и русского языка? помогите !

Answer 1

Пошаговое объяснение:

2часа= 120минут

120:3=40минут- на математику

120-40=80минут

80:4=20минут- на географию

20 минут на русский

Answer 2

Ответ:

2 часа = 120 минут

на математику Коля потратил: 120 ÷ 3 = 40 минут

на географию и русский язык у него осталось 120 - 40 = 80 минут

на географию он потратил: 80 ÷ 4 = 20 минут

а на русский язык он потратил: 80 - 20 = 60 минут (1 час)

Ответ: 40 минут на математику;

20 минут на географию

и 60 минут на русский язык

Answer 3

Problem Analysis

To solve this problem, we need to determine the amount of time Kolya spent on preparing for each subject: mathematics, geography, and Russian language. We are given that Kolya spent 2 hours preparing for his lessons. He spent 1/3 of that time on mathematics, 1/4 of the remaining time on geography, and the rest of the time on writing an essay for Russian language.

Solution

Let's break down the problem step by step:

1. Kolya spent 2 hours preparing for his lessons. 2. He spent 1/3 of that time on mathematics. To find the time spent on mathematics, we can multiply 2 hours by 1/3: 2 * 1/3 = 2/3 hours. 3. The remaining time after mathematics is 2/3 hours. 4. Kolya spent 1/4 of the remaining time on geography. To find the time spent on geography, we can multiply 2/3 hours by 1/4: 2/3 * 1/4 = 2/12 hours. 5. The remaining time after geography is 2/12 hours. 6. Kolya spent the rest of the time on writing an essay for Russian language. The rest of the time is the remaining time after mathematics and geography, which is 2/12 hours. 7. Therefore, Kolya spent 2/3 hours on mathematics, 2/12 hours on geography, and 2/12 hours on writing an essay for Russian language.

Calculation

To convert the time spent into minutes, we need to multiply the hours by 60 (since there are 60 minutes in an hour).

1. Time spent on mathematics: 2/3 hours * 60 minutes/hour = 40 minutes. 2. Time spent on geography: 2/12 hours * 60 minutes/hour = 10 minutes. 3. Time spent on writing an essay for Russian language: 2/12 hours * 60 minutes/hour = 10 minutes.

Therefore, Kolya spent 40 minutes on mathematics, 10 minutes on geography, and 10 minutes on writing an essay for Russian language.

Answer

Kolya spent 40 minutes on mathematics, 10 minutes on geography, and 10 minutes on writing an essay for Russian language.