Question

Катер по течению реки за 4 часа проплыл 88км. КАКОЙ путь проплывет катер за 2,8 часа против течение реки, если скорость течения реки 2,7 км/час.... Скажите пж как сделать пж пж пж пж даю 15 балл

Answer 1

Ответ:

48 км

Пошаговое объяснение:

V катера-x

S=V*t

4(x+2,7)=88

4x+10,8=88

4x=88-10,8

4x=77,2|:4

x=19,3(км/ч)-V катера

(19,3-2,7)2,8=16,6*2,8=46,48км

Answer 2

To calculate the distance the boat will travel against the current, we can use the formula:

Distance = Speed x Time

Given that the boat travels at a speed of 88 km in 4 hours with the current, we can calculate its speed:

Speed = Distance / Time = 88 km / 4 hours = 22 km/h [[1]]

Now, let's calculate the distance the boat will travel against the current in 2.8 hours. We know that the speed of the current is 2.7 km/h.

To calculate the boat's effective speed against the current, we subtract the speed of the current from the boat's speed:

Effective Speed = Boat's Speed - Current's Speed = 22 km/h - 2.7 km/h = 19.3 km/h

Finally, we can calculate the distance the boat will travel against the current:

Distance = Speed x Time = 19.3 km/h x 2.8 hours = 54.04 km

Therefore, the boat will travel approximately 54.04 km against the current in 2.8 hours [[1]].

I hope this helps! Let me know if you have any further questions.