Question

В 8 часов расстояние между 2 катерами, плывущими навстречу друг другу, было 250 км. Скорости катеров 25 км/ч 35 км/ч. Встретятся ли они до 12 часов того же дня? Через сколько времени произойдёт встреча? (Ответы вырази сначала в часах, а затем в часах и минутах.)

Answer 1

25+35=60км/ч,

250/60=4ч17мин,

8+4ч17ин=12ч17мин -не встретятся

Answer 2

1)12-8=4 ЧАСОВ

2)25 *4= 100 КМ ПРОЕДЕТ ПЕРВЫЙ КАТЕР ЗА 4 ЧАСА

3) 35 *4 = 140КМ ПРОЕДЕТ ВТОРОЙ КАТЕР

4) 100+140 =240 КМ ПРОЕДУТ ОБА ЗА 4ЧАСА

5) 250-240= 10 КМ РАССТОЯНИЕ ДО 12 ЧАСОВ

6) 25+35 =60КМ/Ч =1КМ/МИН ОБЩАЯ СКОРОСТЬ

7)10 КМ :1 КМ/ХВ =10 ХВ

8) 12Ч +10МИН= 12Ч10МИН ВСТРЕТЯТЬСЯ

ОТВЕТ до 12ч не встретяся, а встреча произойдет в 12ч 10мин

Answer 3

Problem Analysis

We have two boats traveling towards each other. The distance between them is 250 km. The speeds of the boats are 25 km/h and 35 km/h. We need to determine if they will meet before 12:00 PM and calculate the time it will take for them to meet.

Solution

To solve this problem, we can use the formula: time = distance / speed. We will calculate the time it takes for each boat to cover the distance and check if the sum of the times is less than 4 hours (12:00 PM).

Let's calculate the time it takes for each boat to cover the distance:

Boat 1: - Speed: 25 km/h - Distance: 250 km - Time = distance / speed = 250 km / 25 km/h = 10 hours

Boat 2: - Speed: 35 km/h - Distance: 250 km - Time = distance / speed = 250 km / 35 km/h = 7.14 hours

The total time it takes for both boats to meet is 10 hours + 7.14 hours = 17.14 hours.

Since 17.14 hours is greater than 12 hours, the boats will not meet before 12:00 PM.

Now, let's calculate the exact time of their meeting:

The time it takes for Boat 1 to meet Boat 2 is 7.14 hours.

To convert this time to hours and minutes, we can use the following steps: - Extract the integer part of the time (hours): 7 hours - Multiply the decimal part of the time by 60 to get the minutes: 0.14 * 60 = 8.4 minutes (approximately)

Therefore, the boats will meet after approximately 7 hours and