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What is the difference between the circumferences of 2 circles such th

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New post 09 Feb 2017, 04:24
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A
B
C
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E

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Question Stats:

91% (00:45) correct 9% (00:38) wrong based on 55 sessions

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What is the difference between the circumferences of 2 circles such that the diameters of the circles are 10 and 11?

A. \(\frac{π}{2}\)
B. \(π\)
C. \(3\frac{π}{2}\)
D. \(2π\)
E. \(5\frac{π}{2}\)

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Re: What is the difference between the circumferences of 2 circles such th  [#permalink]

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New post 09 Feb 2017, 04:28
MathRevolution wrote:
What is the difference between the circumferences of 2 circles such that the diameters of the circles are 10 and 11?

A. \(\frac{π}{2}\)
B. \(π\)
C. \(3\frac{π}{2}\)
D. \(2π\)
E. \(5\frac{π}{2}\)



difference between the circumferences of 2 circles such that the diameters of the circles are 10 and 11
= 11\(π\) - 10\(π\)
= \(π\)

Hence Option B is correct.
Hit Kudos if you liked it 8-)
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Re: What is the difference between the circumferences of 2 circles such th  [#permalink]

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New post 09 Feb 2017, 13:30
Circumference = π D

Difference = πD1 - πD2 = 11π - 10π = π

Answer = B
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Re: What is the difference between the circumferences of 2 circles such th  [#permalink]

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New post 12 Feb 2017, 17:24
==> The circumference of a circle is \(π\)d, thus \(π(11-10)= π\).

Therefore, the answer is B.
Answer: B
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Re: What is the difference between the circumferences of 2 circles such th  [#permalink]

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New post 13 Feb 2017, 16:08
MathRevolution wrote:
What is the difference between the circumferences of 2 circles such that the diameters of the circles are 10 and 11?

A. \(\frac{π}{2}\)
B. \(π\)
C. \(3\frac{π}{2}\)
D. \(2π\)
E. \(5\frac{π}{2}\)


The circumference of the circle with a diameter of 10 is 10π, and the circumference of the circle with a diameter of 11 is 11π.

Thus, the difference is 11π - 10π = π.

Answer: B
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Re: What is the difference between the circumferences of 2 circles such th &nbs [#permalink] 13 Feb 2017, 16:08
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