GMAT Club Forumhttps://gmatclub.com:443/forum/ On an aerial photograph, the surface of a pond appears ashttps://gmatclub.com/forum/on-an-aerial-photograph-the-surface-of-a-pond-appears-as-28974.html Page 1 of 1

 Author: M8 [ 30 Apr 2006, 07:03 ] Post subject: On an aerial photograph, the surface of a pond appears as On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?A. 1.3B. 2.4C. 3.0D. 3.8E. 5.0OPEN DISCUSSION OF THIS QUESTION IS HERE: on-an-aerial-photograph-the-surface-of-a-pond-appears-as-100605.html

 Author: Bunuel [ 21 Jul 2015, 01:42 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as M8 wrote:On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?A. 1.3B. 2.4C. 3.0D. 3.8E. 5.0As 1 inch = 2 miles, then 7/16 inches = 2*7/16 = 7/8 miles. So actual radius is 7/8 miles. $$Area=\pi{r^2}\approx{\frac{22}{7}*\frac{49}{64}}\approx{2.4}$$ (as we are asked about the approximate value we can take $$\pi\approx{\frac{22}{7}}$$).Answer: B.OPEN DISCUSSION OF THIS QUESTION IS HERE: on-an-aerial-photograph-the-surface-of-a-pond-appears-as-100605.html

 Author: ywilfred [ 02 May 2006, 00:25 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as 7/16 inch = 7/16 * 2 = 7/8 miles. Area = pi * r^2 = 22/7 * 7/8 * 7/8 = 77/32 = ~2.4

 Author: cdm2006 [ 01 May 2006, 03:22 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as B as well my estimate was: for r: 2*7/16= 7/8 and then 3*49/64= 150/64

 Author: sm176811 [ 03 May 2006, 03:18 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as Agreed... Answer is 2.4! B... Quote of the day: "Time to Charge Ahead!!"

 Author: shampoo [ 03 May 2006, 09:03 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as B. use the given ratio to convert the radius so, 7/8. area: (7/8)^2 * 3. I heard we can use Pie=3 on gmat, is that true?

 Author: sm176811 [ 03 May 2006, 09:07 ] Post subject: Re: On an aerial photograph, the surface of a pond appears as shampoo wrote:B. use the given ratio to convert the radius so, 7/8. area: (7/8)^2 * 3.I heard we can use Pie=3 on gmat, is that true? I have seen different values used in different problems. I think it depends on the question and the values given to you. For some 22/7 works very nice as it cancels the given values!

 Page 1 of 1 All times are UTC - 8 hours Powered by phpBB © phpBB Grouphttp://www.phpbb.com/