engineering recuitment Vizag Steel MT Mechanical 2020 Test Series Quantitative Aptitude Time and Work Pipe and Cistern
Pipe ‘A’ and ‘B’ can fill a cistern in 15 and 20 hrs respectively and pipe ‘C’ can empty it in 10 hrs. If all the three are simultaneously opened, then the time required for the cistern to be filled is –
1
40 hrs
2
80 hrs
3
60 hrs
4
50 hrs