Correct Answer: B
Explanation:
The executive moves from his office O to office A and then to office B.
Clearly, Triangle OAB is right-angled triangle.
So, OA2 = OB2 + AB2
OB2 = OA2 – AB2
OB = √172 - 152 = 2 √64 = 8
Thus, the executive is 8 km to the east of his initial position.
