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UPSC Civil ServicesPrelims2026General Studies Paper II (CSAT)
Question
QQ41. An explosion takes place at a certain distance from an army camp. As soon as the sensor in the camp receives the sound of the explosion, a drone starts flying towards the spot of explosion. The drone clicks a picture from the spot and the camp receives it at the same time. Immediately another drone starts flying to the spot and it also sends a picture as soon as it reaches the spot. The two pictures were received at 5:02 PM and 5:05 PM, respectively. If the speed of the drones is 30 m/s, at what time did the explosion take place? Assume that the speed of sound is 300 m/s.
Options
- A 4:59:00 PM
- B 4:59:02 PM
- C 4:58:42 PM
- D 4:56:32 PM
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Correct Answer
C 4:58:42 PM
Model Answer
Answer: option C, as per UPSC's provisional answer key of 27 May 2026 (Series A). UPSC publishes the final key after the exam's final result.