Question : Akshita and Raina are typing a book, but have only one laptop to work on. They decided that they would work on an alternate basis such that Akshita would work for the first day, Raina would work for the second day, Akshita for the third day and so on. Akshita alone can finish the typing work in 16 days, while Raina will take 24 days if she works alone on the entire book. How many days will they take to finish the typing work if they work on an alternate basis?

Option 1: 15

Option 2: 18

Option 3: 19

Option 4: 17

Question : A group of workers can complete a piece of work in 50 days when they are working individually. On the first day one person works, on the second day, another person joins him, on the third day one more person joins them and this process continues till the work is completed. How many approximate days are needed to complete the work?

Option 1: 8 days

Option 2: 9 days

Option 3: 10 days

Option 4: 11 days

Question : A can do work in 12 days and B in 24 days. If they work together, in how many days will they finish the work?

Option 1: 12 days

Option 2: 20 days

Option 3: 15 days

Option 4: 8 days

Question : A can do work in 12 days and B in 20 days. If they together work on it for 5 days and the remaining work is completed by C in 3 days, then in how many days can C do the same work alone?

Option 1: 10 days

Option 2: 9 days

Option 3: 12 days

Option 4: 15 days

Question : A, B and C can do a piece of work in 11 days, 20 days and 55 days respectively. How soon can the work be done if A works with B on the first day, A works with C on the second day and so on?

Option 1: $8 \frac{1}{2}$ days

Option 2: $9\frac{1}{2}$ days

Option 3: 8 days

Option 4: 9 days

Question : A and B complete a work in 24 and 30 days, respectively, working 10 hours per day. The work is to be done in two shifts. The morning shift is for 6 hours and the evening shift is for 4 hours. On the first day, A works in the morning and B works in the evening, and they interchange their shifts every day. On which day did the work get completed?

Option 1: 21st day

Option 2: 24th day

Option 3: 30th day

Option 4: 27th day