on a windy day a leaf is blown from 5m high central branch tree.

on a windy day a leaf is blown from 5m high central branch tree. As soon as it leaves the branch it is blown at 10ms-1 towards the East until it lands in a river flowing south. The leaf then floats down the river at 3ms-1 FOR 20 seconds until it gets caught on a rock. How far and in what direction from the base of the tree is the rock?