Question : Working 7 hours a day, 18 persons can complete a certain work in 32 days. In how many days would 14 persons complete the same work, working 8 hours a day?

Option 1: 42

Option 2: 30

Option 3: 35

Option 4: 36

Question : Reena, Veena, and Vimla can do a work in 4 hours, 8 hours, and 12 hours, respectively. In how much time will they finish the work working together?

Option 1: $\frac{2}{11}$ hours

Option 2: $5\frac{2}{11}$ hours

Option 3: $3\frac{2}{11}$ hours

Option 4: $2\frac{2}{11}$ hours

Question : If 45 persons can complete a work in 18 days, working 8 hours a day, then how many persons are required to complete two-thirds of the same work in 20 days, working 9 hours a day?

Option 1: 36

Option 2: 40

Option 3: 30

Option 4: 24

Question : If 10 men can complete a piece of work in 12 days by working 7 hours a day, then in how many days can 14 men do the same work by working 6 hours a day?

Option 1: 15

Option 2: 16

Option 3: 10

Option 4: 12

Question : A and B working together can do a piece of work in $4\frac{1}{2}$ hours. B and C working together can do it in 3 hours. C and A working together can do it in $2\frac{1}{4}$ hours. All of them begin the work at the same time. Find how much time they will take to finish the piece of work.

Option 1: 3 hours

Option 2: 2 hours

Option 3: 2.5 hours

Option 4: 3.25 hours