X and Y are two children playing a game. They start from the same point. X walks 11 m North, then turns to his right and walks 21 m. At the same time, Y walks 11 m East, then turns South and walks 5 m, then turns to his left and walks 10 m. Where is Y now with respect to the position of X?
A balloon is connected to a meteorological station by a cable of length 130 m, inclined at 60 deg to the horizontal. Find the height of the balloon from the ground. Assume that there is no slack in cable.