Question : P and Q can do a piece of work in 14 days. Q and R together can do it in 21 days. If P is twice as good a workman as R, then in how many days Q alone can do the work?

Option 1: 42 days

Option 2: 40 days

Option 3: 35 days

Option 4: 38 days

Question : A is twice as good a workman as B and B is twice as good a workman as C. If A and B can together finish a piece of work in 4 days, then C can do it by himself in:

Option 1: 6 days

Option 2: 8 days

Option 3: 24 days

Option 4: 12 days

Question : P, Q and R together can complete a work in 40 days. P and Q together can complete the same work in 90 days. Then R alone can complete the same work in how many days?

Option 1: 40 days

Option 2: 72 days

Option 3: 84 days

Option 4: 90 days

Question : A can do a certain piece of work in 2.4 times the number of days in which B and C together can do it. If A and B together can do the same piece of work in 27 days and C alone can do it in 75 days, then how many days will B take to do this piece of work alone?

Option 1: 54

Option 2: 48

Option 3: 45

Option 4: 42

Question : P and Q can do a work together in 30 days. Q and R can do the same work together in 24 days and R and P together in 20 days. They started the work together, but Q and R left after 10 days. How many more days will P take to finish the remaining work?

Option 1: 23

Option 2: 21

Option 3: 18

Option 4: 19

Question : A is twice as good a workman as B and together they complete a task in 13 days. In how many days will B alone complete the task?

Option 1: 39

Option 2: 42

Option 3: 21

Option 4: 18.5