question_answer

A person starts from a point A and travels 3 km towards East to reach point B. Then he turns left and travels thrice that distance to reach C. He again turns left and travels five times the distance he covered between A and B and reaches his destination D. The shortest distance between the starting point and the destination is?

A) 16 km

B)               18 km

C) 15 km              

D) 27 km

Correct Answer: C

Solution :

The shortest distance between the starting point and the destination D \[=\]\[\sqrt{{{(15-3)}^{2}}+{{(9)}^{2}}}\] \[=\sqrt{144+81}\] \[=\sqrt{225}\] \[=15\,\,km\]