Question

Kishen walks $10$ km towards North, From there, he walks $6$ km towards South. Then, he walks $3$ km towards East. How far and in which direction is he with reference to his starting point ?

• A. $5$ km, North
• B. $5$ km, North-East
• C. $7$ km, East
• D. $7$ km, West

Answer 1

The correct option is B $5$ km, North-East

As per the question, Kishen starts form point $A$ and ends at point $D.$

Thus, his distance form $A$ to $D$ can be calculated using Pythagoras theorem,
Hence, $A{D}^2=C{D}^2+A{C}^2$
$A{D}^2=3^2+4^2$
$AD=5$ km and his direction is North East.