Data Sufficiency (DS) | Re: Word Problem - A solution consists of only water and alcohol such that

A simple solution to this could be: C1 x V1 (initial) = C2 x V2 (final)

We are given, for concentration of alcohol:
C1 = 70%
C2 =60%.
[V1= We need to find.]

Using Statement 1: We get V2= 350lits.
Putting this in above equation,
we get V1 = 60 x 350/70 = 300 lits.

Hence the water that was added is 50 lits.

Stmt 1 is sufficient.

Stmt 2: It simply re-states the ratio of concentration of Alcohol and Water in actual quantities. It does not give any new relation. Hence it is not sufficient.

The answer
...

---