Teaching Railway Teacher PRT 2025 Mock Test Series Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill up a tank in 30minutes and 40 minutes respectively and another pipe can empty the full tank in 20 minutes. If all the pipes are opened when the tank is half full then time required to fill the tank will be:
1
1 hour
2
2 hours
3
3 hours
4
2 hours & 30 minutes