11.

9 children can complete a piece of work in 360 days; 18 men can complete the same piece of work in 72 days and 12 women can complete it in 162 days. In how many days can 4 men, 12 women and 10 children together complete the piece of work?

A. 68 days B. 81 days
C. 96 days D. 124 days
Answer:B
Explanation:

12.

Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank in gallons is.

A. 100 B. 115
C. 120 D. 125
Answer:C
Explanation: Work done by the waste pipe in 1 minute 1/15 - (1/20 + 1/24) 1/15 - 11/120 = -1/40 Volume of 1/14 part = 3 gallons. Therefore, Volume of whole =(3*40)gallons = 120 gallons.

13.

A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

A. 400 B. 550
C. 600 D. 725
Answer:A
Explanation: C's 1 day's work = 1/3 - (1/6 + 1/8) = 1/3- 7/24 = 1/24. A's wages : B's wages : C's wages = 1/6 : 1/8 : 1/24 = 4 : 3 : 1 C's share (for 3 days) = Rs. (3 x 1/24 x 3200) Rs. = 400.

14.

3 men or 5 women can do a work in 12 days. How long will 6 men and 5 women take to finish the work?

A. 30 B. 26
C. 24 D. 21
Answer:C
Explanation: 12 men can finish a work in 36 days. 18 men can finish the work in = (12/18)x36=24

15.

A and B can finish a piece of work in 12 days and 18 days respectively. A begins to do the work and they work alternately one at a time for one day each. The whole work will be completed in

A. 14 1/3 days B. 15 2/3 days
C. 16 1/3 days D. 18 2/3 days
Answer:A
Explanation: