SSC Government Jobs Exams Numerical Ability Alligation or Mixture

In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is:
A. 20 litres B. 30 litres
C. 40 litres D. 60 litres

Read Solution (Total 2)

let initially it contains x litres of liquid...den volume of A type and B type are 5x/7 and 2x/7 respectively now when 9 litres are drawn off amount of A type removed = 5*9/7 and amount of B type removed = 2*9/7 and den 9 litres of B type is added....so resulting amount of A=5x/7-45/7 and resulting amount of B type=2x/7-(18/7)+9...so (5x/7-45/7)/(2x/7-(18/7)+9)=7/9 =>x= 720/31 litres
11 years agoHelpfull: Yes(1) No(4)

clearly M=40 & W=20 (since mixture is 2:1 from 60lit mixture)
according to condition
M=40 & W=20+60=80
now M:W=40:80=1:2
8 years agoHelpfull: Yes(0) No(0)

SSC Other Question

A woman sells to the first customer half her stock & half apple,to the second customer half apple & half of the remaining stock & so also to third & to a fourth customer .She find that she have now 15 apples left. How many had she at first. A and B can do a piece of work in 10 days. B and C can do it in 12 days. C can do it in 20 days. How long will A take to do it alone?