Предмет: Математика, автор: Moutindie

2 целых 2/29 часть от 2 недели 3 суток 12 часов 30 минут равны (в часах)

29

A) 19 2/3

B) 29

C) 100/3

D) 25 1/3

E) 25​

Ответы

Автор ответа: iramazurk
1

Ответ:

Пошаговое объяснение:

2 неделя = 14 дней

1 день = 24 часа

2 недели = 24 * 14 = 336 часов

3 суток = 3 дня

3 суток = 3 * 24 = 72 часа

12 часов 30 минут = 12,5 часов

336 + 72 + 12,5 = 420,5 часов = 420. 5/10 =

420. 1/2

2. 2/29 * 420. 1/2 =

60/29 * 841/2 = 30/1 * 29/1 = 870/1 = 870 часов


iramazurk: В условии точно 2 целых 2/29????
iramazurk: Может просто 2/29???
Moutindie: там походу опечатка в условии
iramazurk: Наверное
Moutindie: а если 2/29?
Moutindie: какой вариант будет?
iramazurk: Тогда 29 часов
Moutindie: спасибо
iramazurk: 2/29 * 420. 1/2 = 2/29 * 841/2 = 841/29 = 29
iramazurk: Может это 2 стоит как номер задания, а ты подумал(а) что это 2 целых?
Автор ответа: ludmilaksenija2005
0

Пошаговое объяснение:

2 недели =14 суток=14×24=336 ч

3 сутки=3×24=72 ч

12 ч 30 мин=12 ч×60 мин=720 мин+30 мин=

=750 мин:60=12,5 ч

336+72+12,5=420,5 ч

Пропорция:

420,5 час - 1 ч

Х час - 2 2/29 ч

420,5×2 2/29:1=420 1/2×60/29=

=841/2×60/29=870 часов

Нет подходящего ответа

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