Aptitude Chapter-12

Bodhak competitive bank exam time work in this chapter we will discuss Time and Work, Pipes and Cisterns, Number system. We will see how o solve through equations and through shortcut methods.

Time and Work:

A can do a piece of work in x days then A’s one day work is 1/x.

B can do a piece of work in y days then B’s one day work is 1/y.

 

 

 

competitive bank exam time & work

A and B one day work is 1/x + 1/y

If C’s one day work is 1/z then he can complete the work in z days.

an example quotation:

A can do a piece of work in 20 days, B can do the same work 30 days then A and B together can complete the work in how many days?

Pipes and Cisterns:

Pipes and Cisterns are same as time and work. Their men will work here pipes will work. There total is called units and here total is called litres.

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

Number System:

The L.C.M (Least Common multiple) of 20,30 is

10X2X3 = 60

The H.C.F (Highest Common Factor) of 20,30 is