# Find the speed of the boat along the river and the speed upstream if its own speed is 10 4/5

**Find the speed of the boat along the river and the speed upstream if its own speed is 10 4/5 km / h, and the speed of the river is 6/5 km / h**

Let’s calculate the speed of the boat along the river. We summarize the boat’s own speed – 10 4/5 kilometers per hour and the speed of the river flow – 6/5 kilometers per hour:

10 4/5 + 6/5 = 10 10/5 = 12 kilometers per hour.

The speed of the boat along the river is 12 kilometers per hour.

Let’s calculate the speed of the boat upstream of the river. Let us subtract from the boat’s own speed – 10 4/5 kilometers per hour, the speed of the river flow – 6/5 kilometers per hour:

10 4/5 – 6/5 = 9 3/5 kilometers per hour.

Answer: the speed of the boat downstream is 12 kilometers per hour, and upstream – 9 3/5 kilometers per hour.