Time & Work / Pipes — practice questions, page 13
Browse practice questions
Question12 men and 18 boys working 7 1/2 hours a day do a job in 60 days. A man does as much as 2 boys.…QuestionThree taps together fill a tank in 10 hours. After 2 hours one tap is closed, and the other two…QuestionThe total amount of a job completed so far doubles every day, and the job is finished at the end…QuestionA and B together do 3 times as much as C, and B and C together do twice as much as A. All three…QuestionA, B and C take 20, 30 and 60 days. All start; A leaves after 4 days and B after 8 days; C…Question4 men and 4 women finish a job in 3 days; 2 men and 5 women in 4 days. How long would 1 man alone…QuestionTaps A (3 h), B (4 h) fill a tank and C (6 h) empties it. They are opened at 1 p.m., 2 p.m. and 3…QuestionA and B take 6 days, B and C 10 days, and C and A 15 days. Taking the job as 30 units, how long do…Question5 cats catch 5 rats in 5 minutes. How many cats are needed to catch 100 rats in 100 minutes?QuestionTwo pipes fill a tank in 12 and 18 minutes. A drain removing 4 litres a minute is also open, and…QuestionA pipe fills a tank in 2 hours of running. Water is supplied only during the first 40 minutes of…QuestionTaps A and B fill a tank in 20 and 30 minutes; tap C drains 10 litres a minute. With all three…QuestionThree pipes have diameters in the ratio 1 : 2 : 3, with water flowing at the same speed. The…QuestionPipes A, B and C fill a tank in 10, 20 and 25 minutes. All are opened; after 2 minutes C is…QuestionA contractor employs 100 men to build a hall in 50 days. After 30 days, 3/5 of it is done. How…QuestionA (12 days) starts a job; B (18 days) joins after 3 days and C (36 days) after a further 3 days.…QuestionA (6 days) and B (9 days) work on alternate days, B first. How many days does the job take?QuestionA (10 days) and B (15 days) start a job; after 2 days C (20 days) joins; after 2 more days A…QuestionAn inlet fills a tank in 3 hours and an outlet empties it in 4. They are opened alternately for 1…QuestionTwo people work together on a job. Which statement is always true?Questionm men can do a job in d days. After d/2 days, half of the men leave. How many days does the job…Question3 men in 2 days do as much as 4 women in 3 days. 12 men finish a job in 5 days. How long do 10…QuestionPipe A fills a tank in 10 minutes and pipe B empties it in 15. They are opened alternately for 1…QuestionWorking in pairs, P and Q finish a job in 12 days, Q and R in 15 days, and R and P in 20 days. How…
← Previous · Page 13 of 13