Question

УСПЕЕТ ЛИ МАРИНА ПРОЧИТАТЬ ЗА 2 Ч.КНИГУ,В КОТОРОЙ 42 СТРАНИЦЫ,ЕСЛИ ЗА 6 МИН.ОНА МОЖЕТ ПРОЧИТАТЬ 2 СТРАНИЦЫ

Answer 1

2 ч.=120 мин.

1) 6:2=3 (мин.) - тратит Марина на чтение 1 страницы

2) 3*42=126 (мин.) - потребуется Марине для прочтения всей книги

120 мин.<126 мин.

Ответ: нет, не успеет.

ИЛИ:

2 ч.=120 мин.

1) 42:2=21 (раз) - по 6 минут потребуется Марине для прочтения всей книги

2) 6*21=126 (мин.)

126 мин.>120 мин.

Ответ: нет, не успеет.

ИЛИ:

2 ч.=120 мин.

1) 6:2=3 (мин.) - тратит Марина на чтение 1 страницы

2) 120:3=40 (стр.) - прочтёт Марина за 2 часа

40 стр.<42 cтр.

Ответ: нет, не успеет.

Answer 2

Can Marina read a 42-page book in 2 hours if she can read 2 pages in 6 minutes?

To determine if Marina can read a 42-page book in 2 hours, we need to calculate the total time it would take her to read the entire book based on her reading speed.

Given that Marina can read 2 pages in 6 minutes, we can calculate her reading speed as follows:

1. Calculate the number of pages Marina can read in 1 minute: - Marina can read 2 pages in 6 minutes. - Therefore, Marina can read 1 page in 3 minutes.

2. Calculate the number of pages Marina can read in 1 hour: - There are 60 minutes in 1 hour. - Marina can read 1 page in 3 minutes. - Therefore, Marina can read 20 pages in 1 hour.

3. Calculate the number of pages Marina can read in 2 hours: - Marina can read 20 pages in 1 hour. - Therefore, Marina can read 40 pages in 2 hours.

Based on Marina's reading speed, she would be able to read 40 pages in 2 hours. Since the book has 42 pages, Marina would not be able to finish reading the entire book within 2 hours.

Marina would not be able to read a 42-page book in 2 hours if she can read 2 pages in 6 minutes.