Question

Собственная скорость катера 15,3 км\ч, а скорость течения 2,4 км\ч. За 2ч катер по течению реки преодолел 30% расстояния между пристанями А и В.Чему равно расстояние между пристанями А и В.

Answer 1

1)15,3 + 2,4 = 17,7 км/ч - скорость катера по течению

2) 17,7 * 2 = 35,4км  - прошел катер за 2ч

3) 35,4 / 30 * 100 = 118км - расстояние между пристанями А и В.

Ответ : 118 км расстояние между пристанями А и В.

Answer 2

Calculation of Distance between Ports A and B

To calculate the distance between ports A and B, we need to consider the speed of the boat and the speed of the current.

Given: - Boat speed: 15.3 km/h - Current speed: 2.4 km/h - Time taken: 2 hours - Boat covered 30% of the distance between ports A and B against the current

Let's calculate the distance between ports A and B step by step:

1. Calculate the distance covered by the boat against the current: - The boat's speed against the current is the difference between the boat's speed and the current speed: 15.3 km/h - 2.4 km/h = 12.9 km/h. - The distance covered by the boat against the current is the boat's speed against the current multiplied by the time taken: 12.9 km/h * 2 hours = 25.8 km.

2. Calculate the total distance between ports A and B: - Since the boat covered 30% of the distance against the current, we can set up the equation: 30% of the total distance = 25.8 km. - Let's denote the total distance as 'd'. The equation becomes: 0.3d = 25.8 km. - Solving for 'd', we divide both sides of the equation by 0.3: d = 25.8 km / 0.3 ≈ 86 km.

Therefore, the distance between ports A and B is approximately 86 kilometers.