A person climbs a hill in a straight path from point 'O' on the ground in the direction of north-east and reaches a point 'A' after travelling a distance of 5 km. Then, from the point 'A' he moves to point 'B' in the direction of north-west. Let the distance AB be 12 km. Now, how far is the person away from the starting point 'O'?
A
7 km
B
13 km
C
17 km
D
11 km
Correct Answer: Option B
Explanation
Let's trace the person's path. He starts at point 'O'.
1. First, he travels 5 km in the North-East direction to reach point 'A'.
2. From point 'A', he t