Question

what is likely to happen if the speed of board is equal to a speed of the river as it goes upstream​

Answer 1

Answer:

Upstream

The motion of the boat with respect to the river banks can be of two types. One of the types is when the boat goes in the same direction as the direction of the river. This is what we know as the downstream motion. However, when the boat goes in the opposite direction as that of the stream or the river, it is what we call the upstream motion. In the downstream motion, the boat and the water move in the same direction and thus the speed is more than what it will be when the two are moving opposite to each other. In other words, the upstream motion is slower.