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If the radius of the circle with centre O is 7 and the measure of angl

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If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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New post 18 May 2016, 01:12
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73% (01:09) correct 27% (00:54) wrong based on 113 sessions

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If the radius of the circle with centre O is 7 and the measure of angle AOB is 100, what is the best approximation to the length of arc AB ?

A. 9
B. 10
C. 11
D. 12
E. 13

[Reveal] Spoiler:
Attachment:
p004-10.gif
p004-10.gif [ 647 Bytes | Viewed 3290 times ]
[Reveal] Spoiler: OA

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Kudos [?]: 135739 [0], given: 12707

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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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New post 18 May 2016, 02:54
The arc length : 14 π * (100/360) = 12

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If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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New post 18 May 2016, 07:23
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Bunuel wrote:
Image
If the radius of the circle with centre O is 7 and the measure of angle AOB is 100, what is the best approximation to the length of arc AB ?

A. 9
B. 10
C. 11
D. 12
E. 13

[Reveal] Spoiler:
Attachment:
p004-10.gif


Measure of the arc =\(\frac{θ}{360} * 2π * r\)

Measure of the arc = \(\frac{100}{360} * 2 *\frac{22}{7}* 7\)

Measure of the arc = 12

Hence answer will be (D) 12 :lol: :-D
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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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New post 18 May 2016, 09:48
Arc AB / 2 Pi r = 100 / 360 => Arc AB = 12

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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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New post 24 Nov 2017, 05:34
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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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Kudos [?]: 288 [0], given: 0

Re: If the radius of the circle with centre O is 7 and the measure of angl   [#permalink] 24 Nov 2017, 05:34
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If the radius of the circle with centre O is 7 and the measure of angl

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