Question

Две бригады сшили 441 детский костюм, работая вместе. Первая бригада изготовила 28 костюмов в час, а вторая - 21 костюм в час. Сколько часов бригады шили костюмы?

Answer 1

1 бригада -28 к/ч
2 бригада -21 к/ч  
Всего -441 к
 1)28+ 21=49(к/ч)-вместе 
2)441:49=9(ч) -шили костюмы.
Ответ: 9 часов бригады шили костюмы.
Пожалуйста :)

Answer 2

Calculating the Time Taken to Sew Costumes

To calculate the time taken for the two brigades to sew the costumes, we can use the following approach:

1. Calculate the combined output per hour for both brigades. 2. Divide the total number of costumes by the combined output per hour to find the total hours taken.

Calculation

The first brigade made 28 costumes per hour, and the second brigade made 21 costumes per hour.

To find the combined output per hour: 28 costumes/hour (first brigade) + 21 costumes/hour (second brigade) = 49 costumes/hour

Now, to find the total hours taken to sew 441 costumes: Total hours = Total costumes / Combined output per hour Total hours = 441 costumes / 49 costumes/hour Total hours = 9 hours

The two brigades took 9 hours to sew the 441 costumes.