state gov Allahabad High Court Group D Mock Test Series 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill a tank in 45 and 30 minutes respectively. After sometime the slower pipe was closed. Then the tank was filled by the other pipe in 13 minutes 20 seconds. When was the slower pipe closed after start?
1
8.5 minutes
2
12 minutes
3
15 minutes
4
10 minutes