Question

Одна бригада может убрать урожай с 60 га за 15 дней,а другая-за 10 дней.За сколько дней будет убран урожай с этой площади,если обе бригады будут работать одновременно?*

Answer 1

Первая бригада за день убирает 60/15=4 Га в день. Вторая убирает за 60/10=6 Га в день. Вместе они уберут все за 60/(6+4)=6 дней

Answer 2

Calculation of Harvesting Time

To determine how long it will take to harvest the crop from a 60-hectare area when both brigades work simultaneously, we can calculate the combined efficiency of the two brigades.

Let's denote the efficiency of the first brigade as E1 (which is the area that can be harvested in a day) and the efficiency of the second brigade as E2.

According to the information provided, the first brigade can harvest the crop from 60 hectares in 15 days, and the second brigade can do the same in 10 days.

To find the efficiency of each brigade, we can divide the total area (60 hectares) by the number of days it takes for each brigade to complete the task:

E1 = 60 hectares / 15 days = 4 hectares/day

E2 = 60 hectares / 10 days = 6 hectares/day

Now, to find the combined efficiency of both brigades, we can add their individual efficiencies:

Combined Efficiency = E1 + E2 = 4 hectares/day + 6 hectares/day = 10 hectares/day

Therefore, when both brigades work simultaneously, they can harvest 10 hectares of the crop in a day.

To calculate the total time required to harvest the entire 60-hectare area, we can divide the total area by the combined efficiency:

Total Time = Total Area / Combined Efficiency = 60 hectares / 10 hectares/day = 6 days

Therefore, it will take both brigades working simultaneously 6 days to harvest the crop from the 60-hectare area.

Please note that the calculations above are based on the information provided and assume that the efficiency of each brigade remains constant throughout the harvesting process.