Q16. X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last ?
Question 17
Q17. A is 30 % more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days ?
Question 18
Q18. Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages ?
Question 19
Q19. A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:
Question 20
Q20. Sakshi can do a piece of work in 20 days. Tanya is 25 % more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
