Question

ПОМОГИТЕ!!!!!!. от пристани марьино к пристани алёшино отправился теплоход со скоростью 24км/ч,а за 9 ч до него в этом же направлении вышел буксир с баржами со скоростю 8км/ч, который прибыл в алёшино на 15 ч позже теплохода. Найди расстояние между присанями Как решить арефметическим способом

Answer 1

Сначала решим алгебраически, с Х. 
Время теплохода Х,  путь (=скорость * время)  = 24Х.
Буксир был в пути на 9+15=24 часа больше, чем теплоход. Время буксира (24+Х), 
Расстояние прошел такое же, поэтому 8*(24+Х)=24Х
24Х-8Х=8*24
16Х=192
Х=12 (часов)

Теперь рассуждаем и решаем арифметически.
Буксир был в пути на 9+15=24 часа больше, чем теплоход, и за это время он прошел со скоростью 8 км/час часть пути 24*8=192 км.
 Теплоход со скоростью 24 км/час преодолел ВЕСЬ путь.  
Путь=скорость * время. 
Буксира путь = 192 км + 8*время .
Теплохода путь = 24*время.

Значит, 192 км = 16*время.
Время = 192/16 = 12 часов.

Конечно, с Х ПОНЯТНЕЕ даже ребенку в начальной школе. 

Answer 2

To find the distance between the Mar'ino pier and the Alëshino pier, we can use the formula:

Distance = Speed × Time

Let's break down the information given in the problem:

- The steamboat traveled from the Mar'ino pier to the Alëshino pier at a speed of 24 km/h. - The tugboat with barges left 9 hours before the steamboat from the Mar'ino pier to the Alëshino pier at a speed of 8 km/h. - The tugboat arrived at the Alëshino pier 15 hours after the steamboat.

To solve this problem, we need to find the time it took for the steamboat to travel from the Mar'ino pier to the Alëshino pier. We can then use this time to calculate the distance between the piers.

Calculating the Time for the Steamboat:

Let's assume the time taken by the steamboat to travel from the Mar'ino pier to the Alëshino pier is t hours.

According to the given information, the tugboat left 9 hours before the steamboat and arrived at the Alëshino pier 15 hours after the steamboat. Therefore, the total time taken by the tugboat to travel from the Mar'ino pier to the Alëshino pier is t + 9 + 15 hours.

Since we know the speed of the tugboat is 8 km/h, we can use the formula Distance = Speed × Time to find the distance traveled by the tugboat:

Distance = 8 × (t + 9 + 15)

Calculating the Distance:

Similarly, we can use the formula Distance = Speed × Time to find the distance traveled by the steamboat:

Distance = 24 × t

Since the distance traveled by both the steamboat and the tugboat is the same (the distance between the piers), we can equate the two distances:

24t = 8(t + 9 + 15)

Now, let's solve this equation to find the value of t:

24t = 8t + 8 × 9 + 8 × 15 24t - 8t = 72 + 120 16t = 192 t = 192 / 16 t = 12

Therefore, it took the steamboat 12 hours to travel from the Mar'ino pier to the Alëshino pier.

Now, we can calculate the distance between the piers using the formula Distance = Speed × Time:

Distance = 24 × 12 Distance = 288 km

So, the distance between the Mar'ino pier and the Alëshino pier is 288 km.

Please note that this solution is based on the information provided in the problem.