Question

Швидкість катера за течією ріки 20 цілих 1/3 км/год а проти течії 10 цілих 1/3 км/год. Знайди : а) швидкість течії ріки б) власну швидкість катера в) шлях катера за 3/23 год. озером ​

Answer 1

Ответ:

а)5км/ч б)15км/ч в) не знаю

Пошаговое объяснение:

1/3 км ч вообще не учитываем она не нужна. б) узнаем ср арифмет = 20 + 10 : 2 = 15 км ч. а)20 - 15 = 5км ч. в) не знаю сори(((

Answer 2

Calculation of River Current Speed:

To find the speed of the river current, we can subtract the speed of the boat against the current from the speed of the boat with the current.

Given: - Speed of the boat with the current = 20 1/3 km/h - Speed of the boat against the current = 10 1/3 km/h

To find the speed of the river current, we subtract the speed of the boat against the current from the speed of the boat with the current:

Speed of the river current = Speed of the boat with the current - Speed of the boat against the current

Let's calculate the speed of the river current:

Speed of the river current = 20 1/3 km/h - 10 1/3 km/h

To subtract these mixed numbers, we need to convert them to improper fractions:

Speed of the river current = (61/3) km/h - (31/3) km/h

Now, we can subtract the fractions:

Speed of the river current = (61/3) km/h - (31/3) km/h = (61 - 31)/3 km/h = 30/3 km/h = 10 km/h

Therefore, the speed of the river current is 10 km/h.

Calculation of Boat's Own Speed:

To find the boat's own speed, we can calculate the average of the boat's speed with the current and against the current.

Given: - Speed of the boat with the current = 20 1/3 km/h - Speed of the boat against the current = 10 1/3 km/h

To find the boat's own speed, we calculate the average of the boat's speed with the current and against the current:

Boat's own speed = (Speed of the boat with the current + Speed of the boat against the current) / 2

Let's calculate the boat's own speed:

Boat's own speed = (20 1/3 km/h + 10 1/3 km/h) / 2

To add these mixed numbers, we need to convert them to improper fractions:

Boat's own speed = (61/3) km/h + (31/3) km/h

Now, we can add the fractions:

Boat's own speed = (61/3) km/h + (31/3) km/h = (61 + 31)/3 km/h = 92/3 km/h

Therefore, the boat's own speed is 92/3 km/h.

Calculation of Boat's Distance Traveled:

To find the boat's distance traveled in 3/23 hours, we can multiply the boat's own speed by the given time.

Given: - Time = 3/23 hours - Boat's own speed = 92/3 km/h

To find the boat's distance traveled, we multiply the boat's own speed by the given time:

Boat's distance traveled = Boat's own speed * Time

Let's calculate the boat's distance traveled:

Boat's distance traveled = (92/3 km/h) * (3/23 hours)

When multiplying fractions, we multiply the numerators together and the denominators together:

Boat's distance traveled = (92 * 3) / (3 * 23) km

Simplifying the fraction:

Boat's distance traveled = 276 / 69 km

Dividing the numerator by the denominator:

Boat's distance traveled = 4 km

Therefore, the boat's distance traveled in 3/23 hours is 4 km.

Please let me know if there is anything else I can help you with!