63) What is the area of the park?

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63) What is the area of the park?

by ern5231 » Wed May 12, 2010 3:56 am
A park is in the form of a 5*6 grid(each box is of equal area). At the center of the park, two grids form a pond. The area of the pond is 500 m sq. What is the area of the park?
A 500
B 2500
C 25000
D 75000
E 80000

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by gmatmachoman » Wed May 12, 2010 4:31 am
Let the side of pond be "x"

2 grids form the pond

Area of pond : 2x *x =500

x^2=250

Area of park :

6x * 5x

=30x^2

=30 * 250

=7500

I am getting 7500 . whats the OA?

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by analyst218 » Wed May 12, 2010 10:53 am
gmatmachoman wrote:Let the side of pond be "x"

2 grids form the pond

Area of pond : 2x *x =500

x^2=250

Area of park :

6x * 5x

=30x^2

=30 * 250

=7500

I am getting 7500 . whats the OA?
me too 7500

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by gmatjedi » Wed May 12, 2010 5:45 pm
5x6 grid = 30 units=park
2 units=pond=500

2 units pond/30 units park= 500/x
x = area of park=7500

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by ern5231 » Sun May 16, 2010 4:57 pm
OA is 75000

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by orel » Sun May 16, 2010 6:31 pm
ern5231 wrote:OA is 75000
I got 7500 too.

Is it a typo in the list of answers? or is there a typo in my brains?

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by frank1 » Sun May 16, 2010 6:48 pm
lol...(I was making question unnecessarily complicated....)
for this question,it took 1.5 minutes to understand the question and 15 seconds to solve it
500/2=250

250*3=75.....what ever ....D