A person starts walking from his office towards a partly hall. He walks for 30m towards East. He takes a 90 degree right turn and walks for 15m. He again takes a 90 degree right turn, and walks for another 20m. He then walks for 25m after taking a 90 degree left turn. Turning 90 degree towards his right he walks for 10m to reach the party hall. How far and in which direction is the party hall from his office?