engineering recuitment UPCL AE (E&M) 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
An inlet pipe can fill a tank in 10 hours and an outlet pipe can empty the completely filled tank in 20 hours. Both the pipes are opened at 6.30 a.m. When will the tank get filled?
1
12.00 midnight
2
2 a.m. next day
3
2.30 a.m. next day
4
1 a.m. next day