Question

Моторная лодка в 7:00 вышла из пункта А в пункт В расположенный в 60 км от пункта А пробыв в пункте в 1 ч20 мин лодка отправилась назад и вернула ь в пункт А в 19:00 того же дня определите в ем/ч совственнуб скорость лодки

Answer 1

1)19-1.2=17.8.ч
2)17.8-7=10.8ч(время движения) 
3)10.8/2=5,4ч (столько нужно проплыть лодке для того, чтобы попасть в из пункта A в пункт B)
4)V=60/5.4=11.1 м/c
Ответ: 11.1

Answer 2

Calculation of Boat's Speed

To determine the boat's speed, we need to calculate the total distance traveled and the total time taken.

Given information: - The boat left point A and traveled to point B, which is located 60 km away from point A. - The boat stayed at point B for 1 hour and 20 minutes. - The boat returned to point A and arrived at 19:00 on the same day.

To calculate the boat's speed, we can use the formula:

Speed = Distance / Time

Let's calculate the total distance traveled and the total time taken step by step.

1. Distance traveled from point A to point B: - Distance = 60 km

2. Time taken from point A to point B: - The boat left at 7:00 and arrived at point B at 1:20. - Time taken = 1 hour + 20 minutes = 1.33 hours

3. Distance traveled from point B to point A: - Distance = 60 km (same as the distance from point A to point B)

4. Time taken from point B to point A: - The boat left point B at 1:20 and arrived at point A at 19:00. - Time taken = 17 hours + 40 minutes = 17.67 hours

Now, let's calculate the boat's speed using the formula mentioned above:

Speed = (Distance from A to B + Distance from B to A) / (Time from A to B + Time from B to A)

Speed = (60 km + 60 km) / (1.33 hours + 17.67 hours)

Speed = 120 km / 19 hours

Speed ≈ 6.32 km/h

Therefore, the boat's speed is approximately 6.32 km/h.