question_answer

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

A)  5 kilometres West

B)  5 kilometres North-east

C)  7 kilometres East

D)  7 kilometres West

Correct Answer: B

Solution :

Kunal's distance from starting point A

\[=AD=\sqrt{A{{C}^{2}}+C{{D}^{2}}}=\sqrt{{{4}^{2}}+{{3}^{2}}}=\sqrt{25}=5km\]So, Kunal is 5 km to the North-east of his starting point.