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30 Apr 2006, 08:03
Kudos
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B
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Difficulty:
35%
(medium)
Question Stats:
67% (01:52) correct
33%
(02:00)
wrong
based on 1239
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Not Attempted Yet
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. 1.3
B. 2.4
C. 3.0
D. 3.8
E. 5.0
OPEN DISCUSSION OF THIS QUESTION IS HERE: on-an-aerial-photograph-the-surface-of-a-pond-appears-as-100605.html
A. 1.3
B. 2.4
C. 3.0
D. 3.8
E. 5.0
OPEN DISCUSSION OF THIS QUESTION IS HERE: on-an-aerial-photograph-the-surface-of-a-pond-appears-as-100605.html
21 Jul 2015, 02:42
Kudos
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M8
As 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
