Question

Катер проплыл по течению за 2.4ч. расстояние 55целых1/5км. скорость течения реки 2.5км/ч. найдите собственную скорость катера.

Answer 1

1) 55 1/5:2,4=55,2:2,4=23(км/ч)-скорость по течению
2) 23-2,5=20,5(км/ч)-собственная скорость катера

Answer 2

Calculating the Boat's Speed

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

Boat's speed = Distance / Time

First, let's calculate the boat's speed using the given information.

The boat traveled a distance of 55 1/5 km in 2.4 hours, and the speed of the river's current is 2.5 km/h.

Calculations

The boat's speed can be calculated using the formula:

Boat's speed = Distance / Time

The boat's speed is given by the formula:

Boat's speed = (Distance - (Speed of the river's current * Time)) / Time

Substituting the given values:

Boat's speed = (55 1/5 - (2.5 * 2.4)) / 2.4

Boat's speed = (55.2 - 6) / 2.4

Boat's speed = 49.2 / 2.4

Boat's speed ≈ 20.5 km/h

Conclusion

The boat's speed is approximately 20.5 km/h.