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02 May 2021, 04:45
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
32% (01:23) correct
68%
(01:22)
wrong
based on 38
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure below, point B lies on line segment AC. If the two circular arcs are two semicircles whose diameters are AB and BC, what is the total length of the two arcs?
(1) AB=BC
(2) AC=20
Attachment:
1.png [ 6.77 KiB | Viewed 1730 times ]
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
03 May 2021, 18:32
Kudos
Bookmarks
Bunuel
Statement 1:
No lengths, insufficient.
Statement 2:
Set AB = x, then BC = 20 - x. The two arcs added up are \(\frac{x*\pi }{ 2} + \frac{(20 - x)*\pi }{ 2} = \frac{20*\pi }{ 2}\) so this is sufficient.
Ans: B
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