D) None of these
- 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 until the completion of the work. How long did the work last?
- The Superintendence of Agency can be done by?
- We are moving …… to new examination system.
- “When you argue with a friend, you don’t go home and destroy every object that he ever touched …..?