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29 Aug 2018, 02:26
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
76% (00:41) correct
24%
(01:03)
wrong
based on 79
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What is the area of the shaded region if the center of the larger circle lies on the small circle, as shown?
(1) The diameter of the smaller circle is 5.
(2) The circumference of the larger circle is 10 π.
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Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
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Chethan92
Joined: 18 Jul 2018
Last visit: 21 Apr 2022
Posts: 899
Own Kudos:
Given Kudos: 95
Location: India
Concentration: Operations, General Management
Schools: IIMB EPGP'22 (M)
GMAT 1: 590 Q46 V25
GMAT 2: 690 Q49 V34
WE:Engineering (Energy)
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29 Aug 2018, 02:36
Kudos
Bookmarks
From 1:
Diameter of the smaller circle becomes the radius of the larger circle.
We can determine the area of the shaded region.
Area of larger circle-Area of smaller circle.
Sufficient.
From 2:
Circumference = 2*pi*r = 10Pi.
r = 5 of bigger circle.
Which is the diameter of the smaller circle.
Sufficient.
D is the answer.
Diameter of the smaller circle becomes the radius of the larger circle.
We can determine the area of the shaded region.
Area of larger circle-Area of smaller circle.
Sufficient.
From 2:
Circumference = 2*pi*r = 10Pi.
r = 5 of bigger circle.
Which is the diameter of the smaller circle.
Sufficient.
D is the answer.
29 Aug 2018, 03:04
Kudos
Bookmarks
Bunuel
To know the shaded area, we need to know the radius of any one circle.
Both statements give that info individually.
Answer is D
Thank you = Kudos
29 Aug 2018, 03:39
Kudos
Bookmarks
1. Radius of smaller circle = 2.5
Radius of larger circle = 5
Area of shaded region = Area of larger circle - Area of smaller circle
2. 2* pie * radius = 10 pie
Radius of larger circle = 5
Radius of smaller circle = 2.5
Area of shaded region = Area of larger circle - Area of smaller circle
Answer : D
Posted from my mobile device
Radius of larger circle = 5
Area of shaded region = Area of larger circle - Area of smaller circle
2. 2* pie * radius = 10 pie
Radius of larger circle = 5
Radius of smaller circle = 2.5
Area of shaded region = Area of larger circle - Area of smaller circle
Answer : D
Posted from my mobile device
