Online Mock Test 6: Pipes & Cisterns And Work & Time

10 Questions | Total Attempts: 49  Settings  • 1.
Ram completes 60% of a task in 15 days and then takes the help of Rahim and Rachel. Rahim is 50% as efficient as Ram is and Rachel is 50% as efficient as Rahim is. In how many more days will they complete the work?
• A.

13.33

• B.

8.33

• C.

5.71

• D.

7.71

• 2.
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to empty the tank. Each of the pipes that fill the tank can fill it in 8 hours, while each of those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are fill pipes?
• A.

2

• B.

4

• C.

6

• D.

5

• 3.
Working together, A and B can do a job in 6 days. B and C can do the same job in 10 days, while C and A can do it in 7.5 days. How long will it take if all A, B and C work together to complete the job?
• A.

8 days

• B.

5 days

• C.

3 days

• D.

7 days

• 4.
Working together, A and B can do a job in 6 days. B and C can do the same job in 10 days, while C and A can do it in 7.5 days. How long will it take if  A, alone to complete the job?
• A.

8 days

• B.

6 days

• C.

10 days

• D.

20 days

• 5.
Four men and three women can do a job in 6 days. When five men and six women work on the same job, the work gets completed in 4 days. How long will a woman take to do the job, if she works alone on it?
• A.

18 days

• B.

36 days

• C.

54 days

• D.

None of these

• 6.
Shyam can do a job in 20 days, Ram in 30 days and Singhal in 60 days. If Shyam is helped by Ram and Singhal every 3rd day, how long will it take for them to complete the job?
• A.

12 days

• B.

16 days

• C.

15 days

• D.

10 days

• 7.
Pipe A usually fills a tank in 2 hours. On account of a leak at the bottom of the tank, it takes pipe A 30 more minutes to fill the tank. How long will the leak take to empty a full tank if pipe A is shut?
• A.

2 hours 30 minutes

• B.

5 hours

• C.

4 hours

• D.

10 hours

• 8.
A, B and C can do a work in 5 days, 10 days and 15 days respectively. They started together to do the work but after 2 days A and B left. C did the remaining work (in days).
• A.

1

• B.

3

• C.

5

• D.

4

• 9.
X alone can do a piece of work in 15 days and Y alone can do it in 10 days. X and Y undertook to do it for Rs. 720. With the help of Z they finished it in 5 days. How much is paid to Z?
• A.

Rs. 360

• B.

Rs. 120

• C.

Rs. 240

• D.

Rs. 300

• 10.
A and B can do a piece of work in 21 and 24 days respectively. They started the work together and after some days A leaves the work and B completes the remaining work in 9 days. After how many days did A leave?
• A.

5

• B.

7

• C.

8

• D.

6

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