Raju wants to go to the planetarium. So, he walked $1.5$ km towards East from the place and then turned to the right and walked $2.5$ km and then turned towards East walked $1$ km and turned to South and walked $4$ km and reached the place by walking $2.5$ km towards West. What distance is he from the starting point?

A person starts from point A, walks $30$ m towards the South and reaches Point B. He then takes a right, walks $7$ m, followed by a right turn and walks for $6$ m. He then takes a right turn and walks $7$ m. He takes a final left turn, walks a certain distance and reaches Point R. Point R is $17$ m to the North of point B. What is the distance between Point A and Point R?

A child was looking for his father. He went $90$ m towards East before turning to his right. Then, he went $20$ m before turning to his right again to look for his father at his uncle’s place $30$ m from this point. His father was not there. Then, he went $100$ m to the North before meeting his father in a street. How far from the starting point did the son meet his father?