A mason can build a tank in 12 h. After working for 6 h, he took the help of a boy and finished the work in another 5 h. The time that the boys will take alone to complete the work is
A mason can build a tank in 12 h. After working for 6 h, he took the help of a boy and finished the work in another 5 h. The time that the boys will take alone to complete the work is
A). 30 h
B). 45 h
C). 60 h
D). 64 h
1 answers
Other Questions
1. If 4 men or 6 boys can finish a work in 20 days. How long will 6 men and 11 boys take to finish the same work?
2. A pipe can fill a tank in 120 hours. Due to the leak in its bottom, the tank is filled in 150 hours. If the tank is full, then that leak can empty the tank in howmany hours?
3. A, B and C can do a piece of work in 30, 20 and 10 days respectively. A is assisted by B on one day and by C on the next day. alternately. How long would the work take to finish ?
4. A contractor undertook to do a piece of work in 12 days. He employed certain number of labours, about 3 of them being absent from the very first day, the rest could finish the work in 18 days. Find the number of men originally employed?
5. Tapas works twice as fast as Mihir. If both of them together complete a work in 12 days, Tapas alone can complete it in
6. Pipe A can fill a tank in 8 hrs, while pipe B can empty it in 6 hrs. When both the pipes were opened simultaneously, and pipe B was closed after some time, the tank is full in 12 hrs. For how long was the pipe B opened?
7. Two pipes P and Q can fill the tank alone in 60 and 90 hours respectively. If they are opened together, then in how many hours will the tank be filled?
8. 'A' is twrice as fast as 'B' , and is therefore able to finish a work in 24 days less than 'B' . What is the time in which they can do it working together ?
9. Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days will the book be completed?
10. x can copy 80 pages in 20 hours, x and y together can copy 135 pages in 27 hours. Then y can copy 20 pages in
