BrainLab wrote:
BrainLab wrote:
t(t+4)=672
we can estimate here 20*30=600 --> 22*30=660 So we see that only A or B can be the answer here... 24*28 suits better (22*30)
A bit too large numbers to calculate, not really a GMAT Style, though it's an official GMAT Question.......
we can estimate here 20*30=600 --> 22*30=660 So we see that only A or B can be the answer here... 24*28 suits better (22*30)
A bit too large numbers to calculate, not really a GMAT Style, though it's an official GMAT Question.......
Update
We can complete a square here:\(t^2+4t=672\) ->\(t^2+4t+4=672+4\) -->\((t+2)^2=26^2\)
T=24, -28 Answer (B)
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