state gov MP Patwari (Group 2 Sub Group 4) Mock Test 2025 Quantitative Aptitude Time and Work Pipe and Cistern
One sixth of a water tank is full. Pipes A and B can fill the tank in 6 hours and 9 hours respectively. If both the pipes are opened, how much time will it take to fill the remaining tank completely?
1
4 hours
2
6 hours
3
5 hours
4
3 hours