Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.
See classesLearn live with an expert or move at your own pace. Every option includes the complete TTP study system.
Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.
with Josh Braslow, 20+ years in test prep
Self-paced EA prep. Study on your schedule.
with
Complete access from day one. Study on your schedule.
One approach is to plug in a value for r and see what the output should be.A thin piece of 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in term of r?
A)(pi)r²
B)(pi)r² + 10
C)(pi)r² + 1/4([pi]² * r²)
D)(pi)r² + (40 - 2[pi] * r)²
E)(pi)r² + (10 - 1/2[pi] * r)²
Here's another approach:A thin piece of 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in term of r?
A)(pi)r²
B)(pi)r² + 10
C)(pi)r² + 1/4([pi]² * r²)
D)(pi)r² + (40 - 2[pi] * r)²
E)(pi)r² + (10 - 1/2[pi] * r)²
Thanks aalradadi,aalradadi wrote:man your the best!!! even the companies that charged me money did not replay this fast!! thanks Brent!
any advise for someone will take the test this Thursday?
I took it 8 weeks ago and I scored 580
am aiming for 630
my last to cat were 600 and 630 from Kaplan.
Let’s plug in r = 2. If π is approximately equal to 3, then this would require 12 meters of wire to form the circle whose area will also be approximately equal to 12. We’ll be left with approximately 28 meters of wire to form the square whose area will be approximately equal to 49. Thus the combined area would be approximately equal to 61. So when r = 2, our target answer is 61. Let’s now check the answers...aalradadi wrote:How can I answer this problem?
