Multiple choice general knowledge math & puzzles

Notice the difference between this question and similar question. After reaching the address byomkesh has to start the cycle chase. Byomkesh has old atlas cycle which he can drive at a speed of 10 m/s. however, he starts panting after 3 min and his reduces to 7 m/s. since, he is driving fast his speed drops to 5 m/s after 10 minutes as he gets completely exhausted. If the thief has seen him at a distance of 358 meter and has started running at a consistent speed of 9 m/s. when will be byomkesh able to catch the thief?

  1. 2 min 59 second

  2. never

  3. 5 min 58 second

  4. 6 minutes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initially, Byomkesh's relative speed is 10-9 = 1 m/s. In 3 minutes, he closes 180 m of the 358 m gap, leaving 178 m. After 3 minutes, his speed drops to 7 m/s while the thief continues at 9 m/s, making the relative speed -2 m/s (Byomkesh falls behind). Thus, he never catches the thief.

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