Where do they say "gave GMAT"...and how did you get a 49 V?

SC Guide, 3rd edition. Chapter 9, Page 184.

Plants grow as a result of the sun shining.

Why is this incorrect?

First of all, Statement 2 alone can be dismissed. So you are left with A,C,E. Secondly, you are given that x=3y. Because we are dealing with just percents, we do not need actual numbers for X or Y in this scenario. We know that 3*Y = X, no matter what Y and X are. Therefore, X is 3 times larger than...

What youre missing is the fact that you DONT know that those ratios are holding for that particular rectangle. Lets say it is a square. Then it will create an isosceles triangle that fits the ratio. Or if you are given an angle measure you could figure out whether or not the ratio was "in-play&...