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

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

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New post 14 Sep 2018, 01:49
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A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

60% (02:14) correct 40% (01:55) wrong based on 10 sessions

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

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New post 14 Sep 2018, 02:01
Bunuel wrote:
How many non-overlapping circles with circumference 4 can be drawn in a square with side 12?


A. 81
B. 36
C. 12
D. 9
E. 3


Circumference=4=2\(\pi\)r
r=\(\frac{2}{\pi}\)
Diameter = \(\frac{4}{\pi}\)
Each side of square = 12
No. of non-overlapping circles on each side = \(\frac{12}{4/\pi}\) = \(3\pi\) = 9(Approx)
Total no. of circles = 9x9 = 81
Answer A.
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Re: How many non-overlapping circles with circumference 4 can be drawn in   [#permalink] 14 Sep 2018, 02:01
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