question_answer

Prakash walks 20 metres towards North. He then turns left and walks 40 metres. He again turns left and walks 20 metres. Further, he moves 20 metres after turning to the right. How far is he from his original position?

A) 40 metres       

B)   60 metres

C) 80 metres       

D)   100 metres        

E) None of these

Correct Answer: B

Solution :

Explanation Option [b] is correct. The movements of Prakash are as shown in the diagram given below: Clearly, Prakash?s distance from his initial position \[\operatorname{P} = PX = \left( PS + SX \right)\] \[= \left( QR + SX \right)\] \[= \left( 40 + 20 \right) m = 60 m.\]