Question

Скорость моторной лодки в стоячей воде равна 18 км/ч, скорость течения реки - 2 км/ч. Определите: а) скорость моторной лодки по течению реки; б) скорость моторной лодки против течения реки; в) путь, который пройдет моторная лодка против течения реки за 3 часа; г) путь, который пройдет моторная лодка по течению реки за 3 часа. Помогите прошу!

Answer 1

Ответ:

Пошаговое объяснение:

а) скорость моторной лодки по течению реки; 18+2 = 20км/ч

б) скорость моторной лодки против течения реки; 18 - 2 = 16км/ч

в) путь, который пройдет моторная лодка против течения реки за 3 часа; 16 * 3 = 48км

г) путь, который пройдет моторная лодка по течению реки за 3 часа. 20*3 = 60км

Answer 2

Ответ:a)20 км/ч

Б)16 км/ч

В) 16 × 3 = 48 км/ч

Г)20 × 3 = 60 км/ч

Пошаговое объяснение: по течению скорость прибавляется (суммируется), против течения наоборот.

Answer 3

Calculating Boat Speed and Distance in River Current

To calculate the boat's speed and distance in the river current, we can use the following formulas:

a) Speed of the boat along the river: - The speed of the boat along the river is given by the sum of the boat's speed in still water and the speed of the river current. - Formula: Speed along the river = Boat's speed in still water + Speed of the river current

b) Speed of the boat against the river current: - The speed of the boat against the river current is given by the difference between the boat's speed in still water and the speed of the river current. - Formula: Speed against the river = Boat's speed in still water - Speed of the river current

c) Distance traveled by the boat against the river current: - The distance traveled is given by the product of the speed against the river current and the time taken. - Formula: Distance = Speed against the river * Time

d) Distance traveled by the boat along the river current: - The distance traveled is given by the product of the speed along the river and the time taken. - Formula: Distance = Speed along the river * Time

Now, let's calculate the values based on the given data.

Calculations:

Given: - Speed of the boat in still water = 18 km/h - Speed of the river current = 2 km/h - Time = 3 hours

a) Speed of the boat along the river: - Speed along the river = 18 km/h + 2 km/h = 20 km/h

b) Speed of the boat against the river current: - Speed against the river = 18 km/h - 2 km/h = 16 km/h

c) Distance traveled by the boat against the river current in 3 hours: - Distance = 16 km/h * 3 h = 48 km

d) Distance traveled by the boat along the river current in 3 hours: - Distance = 20 km/h * 3 h = 60 km

Results:

a) Speed of the boat along the river: 20 km/h b) Speed of the boat against the river current: 16 km/h c) Distance traveled by the boat against the river current in 3 hours: 48 km d) Distance traveled by the boat along the river current in 3 hours: 60 km

I hope this helps! If you have any further questions, feel free to ask!