Question

Две бригады сшили 441 детских костюмов ,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 костюмов/час 
2 бригада 21 костюм/час 
1+2 бригада = 21+28 = 49 костюмов в час 
441 / 49 = 9 часов

Answer 2

21+28=49(кост) шили две бригады за час
441:49=9( часов) работали бригады

Answer 3

Calculation of Hours Worked by the Brigades

To calculate the number of hours the brigades worked to sew the costumes, we need to determine the total number of costumes sewn by both brigades and divide it by the combined hourly production rate of the two brigades.

Let's calculate the total number of costumes sewn by both brigades:

- The first brigade sews 28 costumes per hour. - The second brigade sews 21 costumes per hour.

To find the total number of costumes sewn, we can add the number of costumes sewn by each brigade:

28 costumes/hour + 21 costumes/hour = 49 costumes/hour

Now, we know that the two brigades together sewed 441 costumes. To find the number of hours worked, we can divide the total number of costumes by the combined hourly production rate:

441 costumes / 49 costumes/hour = 9 hours

Therefore, the two brigades worked for 9 hours to sew the 441 costumes.