Data Sufficiency (DS) | Re: A piece of string 1½ meters long is cut into three pieces. What is the

Remember we don't need to get the exact answers in DS questions.

From info available l1+l2+l3 = 150 cms and we need to get l1, l2 and l3.

S1: l1 = 20 Not sufficient.

S2: l1 + l2 = l3.
So, 2 l3 = 150 or l3 = 75. So l1+l2 = 75 . Not sufficient to get l1 & l2.

S1 & S2 we can get l1 = 20 & l1 + l2 = 75, so C is sufficient to get the answer.

---