Aptitude Questions and Answers for PLACEMENTS

Ques. A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in:
Op 1: 8 days
Op 2: 10 days
Op 3: 12 days
Op 4: 15 days
Op 5:
Correct Op : 3


Ques. A, B and C together can complete a piece of work in 10 days. All the three started working at it together and after 4 days A left. Then B and C together completed the work in 10 more days. A alone could complete the work in:
Op 1: 15 days
Op 2: 16 days
Op 3: 25 days
Op 4: 50 days
Op 5:
Correct Op : 3


Ques. One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:
Op 1: 81 min
Op 2: 108 min
Op 3: 144 min
Op 4: 192 min
Op 5:
Correct Op : 3


Ques. A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half ?
Op 1: 15 min
Op 2: 20 min
Op 3: 27.5 min
Op 4: 30 min
Op 5:
Correct Op : 4