Question

Собственная скорость катера 15.3 км/ч, а скорость течения 2.4 км/ч. За 2 ч 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 по течению 2)17,7*2=35,4км- расстояние(пройденное) 3)35,4:30%(0,3)=118км

Answer 2

Calculation of Distance between Ports A and B

To calculate the distance between ports A and B, we can use the information provided about the speed of the boat and the speed of the current.

Given: - Boat's speed: 15.3 km/h - Current's speed: 2.4 km/h - Boat traveled 30% of the distance between ports A and B in 2 hours against the current

Let's assume the total distance between ports A and B is represented by D.

To calculate the distance traveled by the boat against the current, we can use the formula:

Distance = Speed × Time

The boat's speed against the current is the difference between the boat's speed and the current's speed:

Boat's speed against the current = Boat's speed - Current's speed

Therefore, the distance traveled by the boat against the current in 2 hours is:

Distance against the current = (Boat's speed against the current) × Time

Substituting the given values:

Distance against the current = (15.3 km/h - 2.4 km/h) × 2 hours

Simplifying the equation:

Distance against the current = 12.9 km/h × 2 hours

Distance against the current = 25.8 km

Since the boat traveled 30% of the total distance between ports A and B against the current, we can set up the following equation:

Distance against the current = 0.3 × Total distance

Substituting the values:

25.8 km = 0.3 × Total distance

Solving for the total distance:

Total distance = 25.8 km / 0.3

Total distance = 86 km

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