From the top of a tree 20 metres high, the angle of depression at a point on the opposite bank of a river is found to be 30° .Find the breadth of the river.

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?