If 6 men take 9 days to complete a work, how many men can complete the work in 3 days?

Twelve children take sixteen days to complete a work which can be completed by 8 adults in 12 days. After working for 3 days, sixteen adults left and six adults and four children joined them. How many days will they take to complete the remaining work ?

A. 3 days

B. 4 days

C. 6 days

D. 8 days

P and Q can complete a work in 15 days and 10 days respectively. They started the work together and then Q left after 2 days. P alone completed the remaining work. The work was finished in__________days.

A. 12

B. 15

C. 22

D. 20

A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?

A. 70

B. 50

C. 40

D. 60

A is thrice as good as B in work. A is able to finish a job in 60 days less than B. They can finish the work in___________days if they work together.

A. 18 days

B. 22 ½ days

C. 24 days

D. 26 days

Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?

A. 3 hrs.

B. 4 hrs,

C. 5 hrs.

D. 6 hrs.