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Updated on: 15 Jul 2019, 04:11
Originally posted by Bunuel on 09 Oct 2018, 01:03.
Last edited by Sajjad1994 on 15 Jul 2019, 04:11, edited 1 time in total.
Last edited by Sajjad1994 on 15 Jul 2019, 04:11, edited 1 time in total.
Added Source
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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:
35%
(medium)
Question Stats:
78% (02:08) correct
22%
(02:30)
wrong
based on 49
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure, AD and BC are lines intersecting at O. What is the value of a ?
(A) 15
(B) 30
(C) 45
(D) 60
(E) 135
Source: Nova GMAT
Difficulty Level: 600
Difficulty Level: 600
Attachment:
lines (1).jpg [ 20.85 KiB | Viewed 6545 times ]
09 Oct 2018, 03:22
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Bunuel
Vertically Opposite angles are equal
5x + 5a = 5y/2
i.e. 2x + 2a = y
Also, 5x + 5a + 2x + 30 = 180
i.e. 7x + 5a = 150
Also, y = 2x + 30
i.e. 2x + 2a = 2x + 30
i.e. a = 15
Answer: Option A
09 Oct 2018, 04:37
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Bunuel
5x+5a=5y/2
2x+30=y
Substitute value of y
10x+10a= 10x+150
10a=150
A=15
Answer A.
Sent from my iPad using GMAT Club Forum mobile app
