P alone can complete a piece of work in 6 days. Work done by Q alone in one day is equal to one-third of the work done by P alone in one day. In how many days can the work be completed if P and Q work
A). 4(3/4)
B). 4(1/2)
C). 4
D). 5
A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?
A). 15
B). 10
C). 20
D). 25
A can do a work in 9 days and B can do the same work in 18 days. If they work together, in how many days will they complete the work?
A). 8
B). 7
C). 6
D). 5
A and B can do a work in 4 hours and 12 hours respectively. A starts the work at 6AM and they work alternately for one hour each. When will the work be completed?
A). 4 days
B). 7 days
C). 5 days
D). 6 days
30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?
A). 5 days
B). 10 days
C). 15 days
D). 20 days