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The length of an arc of a circle is twice the length of the radius

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k14
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The length of an arc of a circle is twice the length of the radius [#permalink] New post   31 Jul 2017, 07:46
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The length of an arc of a circle is twice the length of the radius. Find the angle subtended by the arc at the centre of the circle in degrees and minutes



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Re: The length of an arc of a circle is twice the length of the radius [#permalink] New post   31 Jul 2017, 07:57
The length of an arc of a circle is twice the length of the radius. Find the angle subtended by the arc at the centre of the circle in degrees.

length of an arc = x/360*2*pi*r

Given, length of arc = 2r

therefore, 2r=(x/360)*2*22/7*r

hence, x = 114.1 degrees
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Re: The length of an arc of a circle is twice the length of the radius [#permalink] New post   31 Jul 2017, 08:08
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k14 wrote:
The length of an arc of a circle is twice the length of the radius. Find the angle subtended by the arc at the centre of the circle in degrees and minutes



few points..
1) Q is not GMAT type - pattern or otherwise..
2) pl post Q properly.
3) it is not TOO hard
4) no one will ask you degree and minutes

your query..
radius is r
circumference or 2*pi*r makes an angle 360 at centre ..
2r will make an angle 360/pi= 360*7/22 nearly equal to 114 degree....
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Re: The length of an arc of a circle is twice the length of the radius [#permalink] New post   31 Jul 2017, 23:51
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k14 wrote:
The length of an arc of a circle is twice the length of the radius. Find the angle subtended by the arc at the centre of the circle in degrees and minutes


Please read carefully and follow our RULES OF POSTING. Thank you.



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Re: The length of an arc of a circle is twice the length of the radius [#permalink]
31 Jul 2017, 23:51
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