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The length of an arc of a circle is equal to 1/5 of he circumference o
[#permalink]
17 Dec 2020, 03:15
17 Dec 2020, 03:15
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A
B
C
D
E
Difficulty:
15%
(low)
Question Stats:
83% (00:40) correct
17%
(00:43)
wrong
based on 30
sessions
The length of an arc of a circle is equal to 1/5 of he circumference of the circle. If the length of the arc is 2π, the radius of the circle is
(A) 1
(B) 2
(C) 5
(D) \(\sqrt{10}\)
(E) 10
(A) 1
(B) 2
(C) 5
(D) \(\sqrt{10}\)
(E) 10
VP
Joined: 14 Jul 2020
Posts: 1126
Given Kudos: 351
Location: India
Re: The length of an arc of a circle is equal to 1/5 of he circumference o
[#permalink]
17 Dec 2020, 03:49
17 Dec 2020, 03:49
Given, 2πr * 1/5 = 2π, so r = 5.
Ans. C.
Ans. C.
Re: The length of an arc of a circle is equal to 1/5 of he circumference o
[#permalink]
17 Dec 2020, 06:26
17 Dec 2020, 06:26
The equation formed after reading the question is \(2π=\frac{1}{5}*2πr\).
solving for \(r\) => \(\frac{2π*5}{2π} = 5\).
therefore, the radius is \(5\) and the OA is C.
solving for \(r\) => \(\frac{2π*5}{2π} = 5\).
therefore, the radius is \(5\) and the OA is C.
