Two pipes can fill a tank in 10 hrs. and 12 hrs. respectively while a third pipe empties the full tank in 20 hrs. If all the three pipes operate together , in how much time the tank will be filled?
A. 12 hrs
B. 7.5 hrs
C. 5 hrs
D. 7 hrs
Time and work Mcqs
Time and work MCQs with answers for competitive exams. Math MCQs range from basic to advanced levels, providing preparation for tests.
If two pipes function together, the cistern will be filled in 6 hrs. One pipe fills the cistern 5 hrs. faster than the other. How many hours it take the second pipe to fill the cistern ?
A. 15 hrs
B. 20 hrs
C. 5 hrs
D. 10 hrs
A can do a particular work in 6 days . B can do the same work in 8 days. A and B signed to do it for Rs. 3200. They completed the work in 3 days with the help of C. How much is to be paid to C ?
A. Rs. 420
B. Rs. 400
C. Rs. 380
D. Rs. 600
P and Q can do a work in 30 days. Q and R can do the same work in 24 days and R and P in 20 days. They started the work together, but Q and R left after 10 days. How many days more will P take to finish the work ?
A. 18
B. 12
C. 7
D. 3
If X and Y complete a certain work in 10 days, Y and Z in 16 days and X and Z in 22 days, find the time required for each one to complete the work while working separately ?
A. 40, 30, 120 days
B. 30, 40, 60 days
C. 120, 40, 60 days
D. 120, 60, 80 days
A and B can finish a piece of work in 20 days .B and C in 30 days and C and A in 40 days. In how many days will A alone finish the job ?
A. 45
B. 48
C. 34(2/7)
D. 44
Bilal can do a work in 15 days and Jalal in 12 days. If they work on it together for 4 days, the fraction of work that is left is ?
A. 4/7
B. 1/4
C. 3/5
D. 2/5
A and B can do a work in 8 days, 13, and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in ?
A. 12 days
B. 8 days
C. 4 days
D. 6 days
A can do a certain work-in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in ?
A. 25 days
B. 30 days
C. 15 days
D. 20 days
A and B can do a piece of work in 72 days; B and C can do it in 120 days; A and C can do it in 90 days. In what time can A alone do it?
A. 120 days
B. 150 days
C. 80 days
D. 100 days