Question

Первая бригада может выполнить задание за 24 часа, а вторая за 28 часов. За сколько часов совместной работы они смогут выполнить это задание

Answer 1

1) 1 : 24 = 1/24 часть работы будет выполнена за 1 час 1 бригадой2) 1 : 48=1/48 часть работы будет выполнена за 1 час 2 бригадой3) 1/24+1/48= 3/48 = 1/16 часть работы будет выполнена двумя бригадами за 1 час4) 1:1/16= за 16 часов будет выполнена вся работа,если обе бригады будут работать                                                                                                                                             совместно.

Answer 2

1) 24+48=52 (ч) время работы 2 бригад
2) 52\2=26 (ч)
ответ 26 часов

Answer 3

Calculation of Combined Work Time

To determine how long it will take for the two brigades to complete the task together, we need to calculate their combined work rate.

Let's assume that the first brigade can complete the task in 24 hours, and the second brigade can complete it in 28 hours.

To find the combined work rate, we can use the formula:

Combined Work Rate = 1 / (1/First Brigade's Work Rate + 1/Second Brigade's Work Rate)

Substituting the given values:

Combined Work Rate = 1 / (1/24 + 1/28)

Simplifying the equation:

Combined Work Rate = 1 / (7/168 + 6/168) = 1 / (13/168) = 168/13

Therefore, the combined work rate of the two brigades is 168/13.

To find the time it will take for them to complete the task together, we can use the formula:

Time = 1 / Combined Work Rate

Substituting the value of the combined work rate:

Time = 1 / (168/13) = 13/168

Therefore, the two brigades will be able to complete the task together in approximately 13 hours and 1 minute.

Please note that the above calculation assumes that the work rates of the two brigades remain constant throughout the task and that there are no other factors affecting their efficiency.