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How many non-overlapping circles with circumference 4π can be drawn in

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Math Expert
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How many non-overlapping circles with circumference 4π can be drawn in  [#permalink]

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New post 30 Aug 2018, 05:08
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (01:12) correct 41% (01:48) wrong based on 58 sessions

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Senior Manager
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Re: How many non-overlapping circles with circumference 4π can be drawn in  [#permalink]

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New post 30 Aug 2018, 05:41
Bunuel wrote:
How many non-overlapping circles with circumference 4π can be drawn in a square with side 12?

A. 36
B. 12
C. 9
D. 4
E. 3
Radius of circle to be inscribed =2 units
Diameter of circle to be inscribed =4 units

3 circles along the column =4*3=12 units
We can make 3 columns =3*3= 9 circles

Imho, answer is C

Thank you = Kudos
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Re: How many non-overlapping circles with circumference 4π can be drawn in  [#permalink]

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New post 30 Aug 2018, 06:55
Bunuel wrote:
How many non-overlapping circles with circumference 4π can be drawn in a square with side 12?

A. 36
B. 12
C. 9
D. 4
E. 3


Circumference of circle, 2πr=4π or, radius=2
Diameter of circle=4

Circles will not overlap with each other inside the square iff sum of diameter of circles is equal to the length of sides of the square bot in horizontal and vertical direction.

4+4+4=12 (horizontal direction), No of non-overlapping circles=3
4+4+4=12 (vertical direction), No of non-overlapping circles=3

So, total no of non-overlapping circles=3*3=9
Enclosure:- Diagram for visualization

Ans. (C)
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Re: How many non-overlapping circles with circumference 4π can be drawn in  [#permalink]

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New post 04 Dec 2019, 05:00
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: How many non-overlapping circles with circumference 4π can be drawn in   [#permalink] 04 Dec 2019, 05:00
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