Magical Learning of Quantitative aptitude for placements

A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days    and left the job. In how many days, A alone can finish the remaining work?

• 5 days

• 6 days

• 7 days

• None of these          

6 men can pack 12 boxes in 7 days by working for 7 hours a day. In how many days can  14 men pack 18 boxes if they work for 9 hours a day?

• 3.5 days

• 4 days

• 6 days

• 9 days

4 men can repair a road in 7 hours. How many men are required to repair the road in 2 hours ?

• 14

• 17

• 18

• 16

Two pipes A and B can fill a tank in in 36 hours and 45 hours respectively.If both the pipes are opened simultaneously,how much time will be taken to fill the tank?

• 25

• 20

• 28

• 32

Two pipes A and B can fill a tank in in 10 hours and 12 hours respectively while the third pipe empties the full tank in 20 hours .if all the three pipes operate simultaneously, in how much time will the tank be filled?

• 5 hrs 30 min 

• 6 hrs 30 min

• 7 hr 30 min

• None Of These

Pipe A can fill a tank in 20 hours while pipe B alone can fill it in 30 hours and pipe C can empty the same tank in 40 hours.If all the pipes are opened together,what will be the time needed to make the tank fill?

• 17(1/2) hrs  

• 17(1/7)hrs

• 17 hrs

• 18 hrs  

A can do a work in 12 days and B in 15 days .In how many days they can complete the work if they work together?

• 6(2/3)

• 6

•  6(4/3)

• 6(3/4)

20 men do a piece of work in 12 days working 10 hours a day.In how many days will 25 men complete the same work working 6 hours a day?

• 10

• 16

• 12

• 23

8 men do a piece of work in  9 days working 10 hours a day. Afterv 3 days ,if two more men join them,they work for 12 hours a day, then how many days will it take to complete the remaining work?

• 3

• 5

• 2

• 4

P can do piece of work in 18 days and R in 30days .If they work together for 6 days,find the fraction of the work left.

• 7/15

• 8/15

• 4/13

• 4/15