Bunuel wrote:
If a wire 27 meters long is cut into three pieces of three different lengths, what is the length of the longest piece?
Actually one can solve the question without any formula.
(1) The length of the longest piece is twice the length of the shortest piece --> 6+8+12=27 or 5.5+10.5+11=27. Not sufficient.
(2) The sum of the length of the two shorter pieces is 15 meters --> if the sum of the two shorter pieces is 15 meters then longest piece must be 27-15=12. Sufficient.
Answer: B.
Hi Bunnel
I too came up with same solution
But From 2
we know that all three have different lengths and we now know that one of the lengths is 12 and
sum of the other two lengths is 15, but now when you consider all 3 lengths they can be
11,3,12--------->Length of longest piece is 12
14,1,12----------->Length of longest piece is 14
13,2,12----------->Length of longest piece is 13
So we do not get a unique solution, so i marked C.......Plz correct me if i am wrong
Thanks in advance
Look at the red part. (2) states this in a different way: The sum of the length of the two
pieces is 15 meters, so the third one left must be the longest piece.