A security drone starts at Point X and flies 12 km North to Point Y. From Point Y, it turns clockwise by an angle equal to the angle between the hour hand and minute hand of a standard analog clock at exactly 03:40 PM, and flies for 10 km to reach Point Z. What is the precise degree of clockwise rotation the drone made at Point Y?

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A 120°
B 130°
C 140°
D 150°

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Answer: B. 130°

• Answer Key: B
• Explanation: To find the rotation angle, calculate the angle between the clock hands at 03:40 PM using the formula: Angle = |30H - 5.5M|.
• Here, H = 3 and M = 40.
• Angle = |30(3) - 5.5(40)| = |90 - 220| = |-130| = 130°.
• Therefore, the drone makes a clockwise turn of exactly 130° at Point Y.

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