Submarine P and Submarine Q are equipped with sonar devices that can operate within a 5,000 yard range. Submarine P remains in place while Submarine Q moves 4,700 yards south from Submarine P. Submarine Q then changes course and moves due east, stopping at the maximum range of the sonar devices. In which of the following directions can Submarine Q continue to move and still be within the sonar range of Submarine P? I. North II. South III. West Choose the correct choice
A) I only	B) I and III only	C) II only	D) III only	E) I,II only
It's evident if we make a diagram for the Movement of Q respect to P.   From its South position to the east position, it has covered the maximum radius for the south direction. Similarly, it's east movement further will also make it out of range.   Thus it can only move north or west or anything in that curve.   Answer : I and III only
<result>B</result>
Submarine P and Submarine Q are equipped with sonar devices that can operate within a 5,000 yard range. Submarine P remains in place while Submarine Q moves 4,700 yards south from Submarine P. Submarine Q then changes course and moves due east, stopping at the maximum range of the sonar devices. In which of the following directions can Submarine Q continue to move and still be within the sonar range of Submarine P? I. North II. South III. West