Immediately after leaving his house, Ratvik turned right and walked for 40m. Then he turned left and walked for 20mts. Then he again took a left turn and walked for 30mts. There he met a friend and turned right to go to the coffee shop 20 mts away. After having coffee, he walked back straight for 40mts in the direction he had come from. How far is he from his house?

A

20m

B

0m

C

10m

D

40m