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29 Dec 2014, 09:04
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
93% (00:52) correct
7%
(00:51)
wrong
based on 92
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History
Date
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Result
Not Attempted Yet
Tough and Tricky questions: Geometry.
Attachment:
2014-12-29_2003.png [ 4.72 KiB | Viewed 3629 times ]
A. 5
B. 6
C. 10
D. 12
E. 15
Kudos for a correct solution.
29 Dec 2014, 09:58
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The relation between circumference and radius of a circle is \(C=2\pi*r\). From that we can calculate the radii of the two circles:
\(r_x=2\)
\(r_y=3\)
As the two circles are tangent, the distance between the center points x and y is the sum of the radii, 5.
Answer A.
\(r_x=2\)
\(r_y=3\)
As the two circles are tangent, the distance between the center points x and y is the sum of the radii, 5.
Answer A.
29 Dec 2014, 12:59
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Radius of bigger circle, r1 = 2πr = 6π, so r1= 3
Radius of smaller circle, r2 = 2πr = 4π, so r1= 2
It is said that the circle touches only at 1 point. so the line xy must be a straight line. Hence this will be the sum of radius of 2 circles = 5.
Answer is A
Radius of smaller circle, r2 = 2πr = 4π, so r1= 2
It is said that the circle touches only at 1 point. so the line xy must be a straight line. Hence this will be the sum of radius of 2 circles = 5.
Answer is A
