考试类型:Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
The length of a rectangle is increased by 
, and the width of the rectangle is increased by 
. By what percentage will the area of the rectangle be increased?
A. 
B. 
C. 
D. 
E. 
|
正确答案:D 解析: Let
So, the new area will be:
|
and 
be the original length and width of the rectangle, respectively. If we denote by 
and 
the new length and width of the rectangle, respectively, then we have:
and 
