RRB JE Maths Important Solved MCQs

A and B together can do a piece of work in 30 days. A having worked for 16 days,​​ 

B finishes the remaining work alone in 44 days. In how many days shall B finish the​​ 

whole work alone?

A.

30 days

B.

40 days

C.

60 days

D.

70 days

Answer: Option C

 

Let A's 1 day's work = x and B's 1 day's work = y.

Then, x + y =

1

and 16x + 44y = 1.

30

 

Solving these two equations, we get: x =

1

and y =

1

60

60

 

https://www.indiabix.com/_files/images/aptitude/1-sym-tfr.gif B's 1 day's work =

1

.

60

Hence, B alone shall finish the whole work in 60 days.