UPSC CAPF (AC) 2026 Paper I · Question 60

Question 60 of the UPSC CAPF (AC) 2026 Paper I (19 July 2026). Try it first, then open the answer and explanation.

1. CAPF 2026 · P-I · Q60 · General Mental Ability · Arithmetic

   The brightness of a lightning event was seen at 19:06:17 hr, whereas the sound of the thunder in the same process was heard at 19:06:23 hr. If the speed of the sound is 320 metres per second, then which of the following is the distance in metres between the clouds that produced the lightning and the thunder, and the observer?

   1. 1720
   2. 1820
   3. 1920
   4. 2020

   किसी तड़ित् घटना (lightning event) की चमक 19:06:17 hr पर देखी गई, जबकि उसी प्रक्रिया में गर्जन 19:06:23 hr पर सुनाई दी। यदि ध्वनि की चाल 320 मीटर प्रति सेकंड है, तो तड़ित् तथा गर्जन उत्पन्न करने वाले बादलों और अवलोकनकर्ता के बीच मीटर में दूरी निम्नलिखित में से कितनी है?

   1. 1720
   2. 1820
   3. 1920
   4. 2020
   Show answer

   Answer: (3) 1920

   उत्तर: (3) 1920

   Light reaches the observer almost instantly, so the 6 s gap (19:06:17 to 19:06:23) is the travel time of the sound. Distance = 320 × 6 = 1920 m.

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