The upper part of a tree is broken by the wind in such a way that the tip of the tree makes an angle of 45° with the horizontal. If the height of the tree is 30 feet then at what height from the ground (in feet) is the tree broken?
1
30(√2 - 1)
2
45(√2 - 1)
3
60(√2 - 1)
4
90(√2 - 1)