Query Detail : RBI Grade B Phase I

In the given questions, two quantities are given, one as Quantity I and another as Quantity II. You have to determine relationship between two quantities and choose the appropriate option. A and B can together finish a piece of work in 20 days. If B starts working and after 15 days is replaced by A. A can finish the remaining work in 24 days. Number of days taken by B alone to finish the same piece of work. Number of days taken by A alone to finish the same piece of work.
Garima,   November 6th 2019,  
RBI Grade B Phase I


(A+B)*20 = B*15+A*24

So 20A+20B =15B+24A

4A=5B

So A:B = 5:4

So A is more efficient hence A takes less time than B to do same job

Hence Quantity I > Quantity II.