Question

Скорость лодки против течения реки 3,8 км/ч. Скорость течения реки 1,7 км/ч. Найдите собственную скорость лодки и ее скорость по течению реки. ----------------------------------------------------------------------------------------------------------------------------------------- Скорость катера против течения реки 23,6 км/ч. Скорость течения реки 2,8 км/ч. Найдите собственную скорость катера и его скорость по течению реки -----------------------------------------------------------------------------------------------------------------------------------------РЕБЯТА ПОМОГИТЕ ОЧЕНЬ НАДО, ПОМОГИТЕ.

Answer 1

1) 3,8+1,7=5,5 (км/ч) - собственная скорость
2) 5,5+1,7=7,2 (км/ч) -  скорость по течению

1)23,6+2,8=26,4 (км/ч) - собственная скорость
2) 26,4+2,8=29,2 (км/ч) - скорость по течению

Answer 2

1)3,8+1,7=5,5км/ч-собственная скорость лодки
5,5+1,7=7,2км/ч скорость по течению
2)23,6+2,8=26,4км/ч-собственная скорость
26,4+2,8=29,2км/ч скорость по течению

Answer 3

Problem 1: Speed of a Boat Against River Current

The speed of the boat against the river current is given as 3.8 km/h, and the speed of the river current is 1.7 km/h. We need to find the boat's own speed and its speed relative to the river current.

Let's denote the boat's own speed as V and the speed of the river current as v.

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

V - v = 3.8 To find the boat's speed relative to the river current, we can use the formula:

V + v = 1.7 Now, we can solve these two equations simultaneously to find the values of V and v.

Adding the two equations, we get:

2V = 5.5

Dividing both sides by 2, we find:

V = 2.75 km/h

Substituting the value of V into one of the equations, we can find the value of v:

2.75 + v = 1.7

Subtracting 2.75 from both sides, we find:

v = -1.05 km/h

Therefore, the boat's own speed is 2.75 km/h and its speed relative to the river current is -1.05 km/h.

Problem 2: Speed of a Speedboat Against River Current

The speed of the speedboat against the river current is given as 23.6 km/h, and the speed of the river current is 2.8 km/h. We need to find the speedboat's own speed and its speed relative to the river current.

Let's denote the speedboat's own speed as V and the speed of the river current as v.

To find the speedboat's own speed, we can use the formula:

V - v = 23.6 To find the speedboat's speed relative to the river current, we can use the formula:

V + v = 2.8 Now, we can solve these two equations simultaneously to find the values of V and v.

Adding the two equations, we get:

2V = 26.4

Dividing both sides by 2, we find:

V = 13.2 km/h

Substituting the value of V into one of the equations, we can find the value of v:

13.2 + v = 2.8

Subtracting 13.2 from both sides, we find:

v = -10.4 km/h

Therefore, the speedboat's own speed is 13.2 km/h and its speed relative to the river current is -10.4 km/h.

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