Question

Скорость катера в стоячей воде равна 15 км/ч, скорость течения реки - 3 км/ч. Определите: а) скорочть катера по течению реки; б) скорость катера против течения реки; в) путь, который пройдет катер по течению реки за 2 часа; г) путь, который пройдет катер против течения реки за 2 часа. Помогите!

Answer 1

Ответ:

а) 18 км/ч

б) 12ум/ч

в) 2.16 км

г)1.44 км

Answer 2

Calculation of Boat Speed in Still Water

To determine the boat's speed in still water, we can subtract the speed of the river current from the boat's speed. In this case, the boat's speed in still water is given as 15 km/h, and the speed of the river current is 3 km/h.

a) Speed of the Boat with the River Current: To calculate the boat's speed with the river current, we add the speed of the river current to the boat's speed in still water. The formula is: Boat's speed with the river current = Boat's speed in still water + Speed of the river current.

Substituting the given values: Boat's speed with the river current = 15 km/h + 3 km/h = 18 km/h. [[1]]

b) Speed of the Boat against the River Current: To calculate the boat's speed against the river current, we subtract the speed of the river current from the boat's speed in still water. The formula is: Boat's speed against the river current = Boat's speed in still water - Speed of the river current.

Substituting the given values: Boat's speed against the river current = 15 km/h - 3 km/h = 12 km/h. [[1]]

c) Distance Traveled by the Boat with the River Current in 2 Hours: To calculate the distance traveled by the boat with the river current in 2 hours, we multiply the boat's speed with the river current by the time traveled. The formula is: Distance = Speed × Time.

Substituting the given values: Distance = 18 km/h × 2 hours = 36 km. [[1]]

d) Distance Traveled by the Boat against the River Current in 2 Hours: To calculate the distance traveled by the boat against the river current in 2 hours, we multiply the boat's speed against the river current by the time traveled. The formula is: Distance = Speed × Time.

Substituting the given values: Distance = 12 km/h × 2 hours = 24 km. [[1]]

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