A and B have to type a book together containing 120 pages. A takes 9 hrs to type 36 pages and B takes 5 hrs to type 40 pages. A typed first 60 pages alone and the last 60 pages were typed by A and B together. How much time (in hours) will be taken to type the complete book?
A and B have to type a book together containing 120 pages. A takes 9 hrs to type 36 pages and B takes 5 hrs to type 40 pages. A typed first 60 pages alone and the last 60 pages were typed by A and B together. How much time (in hours) will be taken to type the complete book?
1). 24
2). 20
3). 12
4). 15
1 answers
Other Questions
1. Shan can complete a task in 16 days. When Shan and Jyoti work together on the same task, they receive their wages in the ratio 7 ∶ 4. In how many days will Jyoti complete the task alone?
2. A and B can do a plece of work in 28 and 35 days respectively. They began to work together but A leave after sometime and B completed remaining work in 17 days. After how many days did A leave ?
3. Computer A takes 4 min to process one input, computer B takes 7 min for one input. If computer A, B & C can process an average of 45 inputs in 1 hr., how much time does Computer C alone take to proces
4. X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the work?
5. There are three taps A, B and C in a tank. They can fill the tank in 25 hrs, 20 hrs and 10 hrs respectively. At first all of them are opened simultaneously. Then after 1 hrs, tap C is closed and tap A and B are kept running. After the 4th hour, tap B is also closed. The remaining work is done by tap A alone. Find the percentage of work done by tap A itself?
6. A, Band C can complete a work in 10, 12 and 15 days respectively. They started the work together. But A left the work before 5 days of its completion. B also left the work 2 days after A left. In how many days was the work completed?
7. A, B and C can do a piece of work in 24 days, 30 days and 40 days respectively. They began the work together but C left 4 days before the completion of the work. In how many days was the work complete
8. A works twice as fast as B. if B can complete a work in 12 days independently, the number of days in which A and B can together finish the work is:
9. A, B and C can finish a work in 20, 30 and 60 days respectively working alone. If A and B started working together and after 5 days, B left the work and C joined to finish the remaining work with A. How many days did C work?
10. 4 pipes can fill a reservoir in 15, 20, 30 and 60 hrs the first was opened at 6 am and 2nd at 7 am and thirds at 8 am and 4th at 9 am when will the reservoir be full?
