Mathematics Part-II

Book: Mathematics Part-II

Chapter: 10. Vector Algebra

Subject: Maths - Class 12th

Q. No. 3 of Miscellaneous Exercise

Listen NCERT Audio Books - Kitabein Ab Bolengi


A girl walks 4 km towards west, then she walks 3 km in a direction 30° east of north and stops. Determine the girl’s displacement from her initial point of departure.

let O be the initial position and B be the final position of the girl.

Position of girl will be as shown in figure:

Hence, and BAO = 60°

Now, by using triangle law of vector addition,

Hence girls displacement from initial to final position is :


Chapter Exercises

More Exercise Questions


If , then is it true that ? Justify your answer.