A man has to cover a total distance of 24 km. He observed that after walking for one hour and 40 minutes, the distance covered by him is 5/7 of the remaining distance. What was the speed of the man in km/hr?एक व्यक्ति को कुल 24 कि.मी. दूरी तय करनी है। व्यक्ति ने देखा कि एक घंटा और 40 मिनट तक चलने के बाद, उसके द्वारा तय की गई दूरी शेष दूरी का 5/7 है। उस व्यक्ति की गति कि.मी./घंटा की दर से कितनी थी?

1. A7
2. B5
3. C6
4. D8

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: C. 6

Explanation

Let distance covered = x. Then x = (5/7)(24 − x) → 7x = 120 − 5x → x = 10 km. Time = 1 h 40 min = 5/3 h. Speed = 10 ÷ (5/3) = 6 km/hr.माना तय दूरी = x। तब x = (5/7)(24 − x) → 7x = 120 − 5x → x = 10 कि.मी.। समय = 1 घंटा 40 मिनट = 5/3 घंटा। गति = 10 ÷ (5/3) = 6 कि.मी./घंटा।