HI All,
This question can also be solved by TESTing THE ANSWERS.
We're told that the average length of 3 acts is 46 minutes, so the total length of time is 3(46) = 138 minutes. We're given two facts about how the lengths of the two acts:
1) The first act is 18 minutes shorter than the third act.
2) The first act is half the length of the second act.
We're asked for the length of the third act.
Since the first act is significantly shorter than the other two acts, it's likely that both the second and third acts are LONGER than the average...
Let's TEST Answer D: 48 minutes.
IF....
The third act is 48 minutes, then...
The first act is 48 - 18 = 30 minutes, and...
The second act is 2(30) = 60 minutes
The total is 48+30+60 = 138 minutes, which is an exact MATCH for what we were told. Thus, this MUST be the answer.
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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