Question

В 9 ч расстояние между катерами плывущими навстречу друг другу,было 240км,первый катер двигался со скоростью 25км,ч,а второй -со скоростью 35км/ч,Встретятся ли они до полудня того же дня???

Answer 1

1) 12 - 9 = 3 часа осталось до полудня
2) 25 + 35 = 60 км/ч скорость сближения катеров
3) 60 * 3 = 180 км проедут до полудня катера 
Не встретятся т.к. до полудня успеют пройти только 180 м 
240 - 180 = 60 м останется еще проехать до встречи, т.е. 1 час еще, встретятся 12 + 1 = 13 ч

Answer 2

В час дня они встретятся

Answer 3

Problem Analysis

We are given that two boats are moving towards each other. The distance between them is 240 km. The first boat is moving at a speed of 25 km/h, and the second boat is moving at a speed of 35 km/h. We need to determine if they will meet before noon on the same day.

Solution

To solve this problem, we can use the formula:

Time = Distance / Speed

Let's calculate the time it will take for the two boats to meet.

The first boat is moving at a speed of 25 km/h, so the time it will take for the first boat to cover the distance between them is:

Time taken by the first boat = Distance / Speed = 240 km / 25 km/h = 9.6 hours

Similarly, the second boat is moving at a speed of 35 km/h, so the time it will take for the second boat to cover the distance between them is:

Time taken by the second boat = Distance / Speed = 240 km / 35 km/h = 6.857 hours

Now, let's compare the time taken by both boats. If the total time taken by both boats is less than 12 hours (noon), then they will meet before noon. Otherwise, they will not meet before noon.

Total time taken = Time taken by the first boat + Time taken by the second boat

Total time taken = 9.6 hours + 6.857 hours = 16.457 hours

Since the total time taken is greater than 12 hours, the two boats will not meet before noon on the same day.

Therefore, the answer is no, they will not meet before noon on the same day.

Conclusion

The two boats, moving towards each other with speeds of 25 km/h and 35 km/h respectively, will not meet before noon on the same day. The total time taken for them to meet is 16.457 hours, which is greater than 12 hours.