Poonam walks 20 km towards north. She turns right and walks 12 km. She turns…
2021
Poonam walks 20 km towards north. She turns right and walks 12 km. She turns left and walks 24 km. She turns right and walks 36 km. She finally rotates by an angle of 90 degrees in clockwise direction and walks 24 km. How far and in which direction is her starting point from the finishing point?
- A.
46 km, North-east
- B.
52 km, South-west
- C.
52 km, North-east
- D.
46 km, South-west
Attempted by 20 students.
Show answer & explanation
Correct answer: B
The net movement is 48 km east and 20 km north from the start to the finish. Therefore the starting point is south-west of the finish, and the distance is sqrt(48^2 + 20^2) = 52 km.