Assertion : The angles of elevation of a tower from two points which are at distances `12 m` and `64 m` from the foot of the tower on the opposite sides are complementary. The height of the tower is `24 m.`

Reason : The angles of elevation of a tower from two points which are at distances a' and b' from the foot of the tower are complementary, then the height of the tower is `\sqrt{ab}.`