An outlet empties 2/7 of a tank is 6 minutes . To empty the remaining content, it would further take:
Q1. An outlet empties 2/7 of a tank is 6 minutes . To empty the remaining content, it would further take:
Answer: 15 min
Explanation: The pipe empties 2/7 of the tank in 6 minutes, so the full tank takes 21 minutes; the remaining 5/7 takes 5/7 × 21 = 15 minutes.