Question

Строители первой бригады могут построить здание за 15 месяцев, а строители второй бригады за 10 месяцев. За сколько месяцев могут построить здание две бригады, работая совместно? срочноооооооо

Answer 1

Ответ: за 12 с половиной месяцев

Пошаговое объяснение:

так как:

1) 15+10=25

2) 25:2=12,5

Поставьте лучший ответ пж))

Answer 2

Построят за 12,5 месяцев

Answer 3

Building Time for Two Brigades

To find out how long it would take for two brigades to build a building working together, we can use the concept of their combined work rate.

The first brigade can build a building in 15 months, while the second brigade can do it in 10 months.

Calculating Combined Work Rate

To calculate 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)

Using this formula, we can calculate the combined work rate of the two brigades.

Calculation

The combined work rate of the two brigades is: Combined work rate = 1 / (1/15 + 1/10)

Result

The combined work rate of the two brigades is 6 months.

Conclusion

Therefore, working together, the two brigades can build the building in 6 months.