Question 1142825
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A = 3r^2h^2 = 3(rh)^2<br>
An increase of 100% in the value of (rh) means the value doubles.  When that doubled value is squared, the new area is 4 times the old area.<br>
The question asks how many times GREATER the new A is than the old A.  4 times AS LARGE AS is a 300% INCREASE, which is 3 TIMES LARGER THAN.<br>
So the grammatically correct answer is 3 (answer choice B).  But it is very possible that an answer key for this problem will incorrectly say 4 (choice C).