A book is consists of various chapters, so as the Organization consists of various departments. Therefore if Book is to chapter so organization is to department.
Hence, Book : Chapter :: Organisation : Department.
A child went 90 m in the East to look for his father, then he turned right and went 20 m. After this he turned right and after going 30 m he reached to his uncle's house. His father was not there. From there he went 100 m to his north and met his father. How far did he meet his father from the starting point?