Question

Одна бригада рабочих может заасфальтировать 15км шоссейной дороги за 30 дней,а другая-за 60 дней. За сколько дней могут заасфальтировать эту дорогу обе бригады,работая вместе?

Answer 1

Ответ за 30 дней потому что первые быстрее все сделают

Answer 2

Calculation of Days Required to Asphalt the Road

To determine the number of days required for both brigades to asphalt the road together, we need to calculate their combined asphalt production rate.

Let's denote the asphalt production rate of the first brigade as R1 (in km/day) and the asphalt production rate of the second brigade as R2 (in km/day).

According to the information provided, the first brigade can asphalt 15 km of the road in 30 days, which means their asphalt production rate is:

R1 = 15 km / 30 days = 0.5 km/day.

Similarly, the second brigade can asphalt 15 km of the road in 60 days, which means their asphalt production rate is:

R2 = 15 km / 60 days = 0.25 km/day.

To determine the combined asphalt production rate of both brigades, we add their individual rates:

R_total = R1 + R2 = 0.5 km/day + 0.25 km/day = 0.75 km/day.

Now, we can calculate the number of days required for both brigades to asphalt the entire road by dividing the total length of the road by the combined asphalt production rate:

Days_required = Total_length / R_total.

Since the total length of the road is not provided in the question, we cannot calculate the exact number of days required. However, you can use this formula with the total length of the road to find the answer.

Please provide the total length of the road, and I will be happy to calculate the number of days required for both brigades to asphalt the road together.