Q1. 
A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work in 23 days. The number of days after which A left the work was 
A.  12 

B.  11 

C.  10 

D.  9 
Q2. 
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.  110 

C.  120 

D.  140 
Q3. 
39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work? 
A.  10 

B.  13 

C.  14 

D.  15 
Q4. 
Water flows into a reservoir which is 200 m long and 150 m wide, through a pipe of crosssection (0.3m x 0.2m) at 20 kmph. In what time will the water level be 8? 
A.  100 hrs 

B.  150 hrs 

C.  175 hrs 

D.  200 hrs 
Q5. 
A work is done by three person A, B and C. A alone takes 10 hours to complete a single product but B and C working together takes 4 hours, for the completion of the same product. If all of them worked together and completed 14 products, then how many hours have they worked? 
A.  20 hrs 

B.  28 hrs 

C.  40 hrs 

D.  54 hrs 