Question

488. Собственная скорость теплохода равна 28 5/6 км/ч. Скорость течения реки равна 2 2/3 км/ч. Найдите скорость теплохода по течению и против течения реки.​

Answer 1

Ответ:

по течению = 31 1/2

против течения = 26 1/6

Пошаговое объяснение:

1)28 5/6 + 2 2/3 = 28 5/6 + 2 4/6 =30 9/6 = 31 1/2

2)28 5/6 - 2 2/3 = 28 5/6 - 2 4/6 =26 1/6

Answer 2

Given Information:

The speed of the boat is 28 5/6 km/h, and the speed of the river current is 2 2/3 km/h.

Calculating Speed of the Boat with the Current:

To find the speed of the boat with the current, we need to add the speed of the boat to the speed of the river current.

The speed of the boat with the current is calculated as follows: 28 5/6 km/h + 2 2/3 km/h

To add these two speeds, we need to convert them to a common denominator. The common denominator for 6 and 3 is 6.

Converting the speeds to a common denominator: 28 5/6 km/h = 28 * 6/6 + 5/6 = 168/6 + 5/6 = 173/6 km/h 2 2/3 km/h = 2 * 6/6 + 2/3 = 12/6 + 2/3 = 14/6 km/h

Adding the speeds: 173/6 km/h + 14/6 km/h = (173 + 14)/6 km/h = 187/6 km/h

Therefore, the speed of the boat with the current is 187/6 km/h.

Calculating Speed of the Boat against the Current:

To find the speed of the boat against the current, we need to subtract the speed of the river current from the speed of the boat.

The speed of the boat against the current is calculated as follows: 28 5/6 km/h - 2 2/3 km/h

Using the same common denominator of 6, we can subtract the speeds: 173/6 km/h - 14/6 km/h = (173 - 14)/6 km/h = 159/6 km/h

Therefore, the speed of the boat against the current is 159/6 km/h.

In summary: - The speed of the boat with the current is 187/6 km/h. - The speed of the boat against the current is 159/6 km/h.