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# What is the value of a?

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Math Expert
Joined: 02 Sep 2009
Posts: 52119
What is the value of a?  [#permalink]

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16 Apr 2018, 00:00
00:00

Difficulty:

15% (low)

Question Stats:

88% (00:18) correct 12% (00:30) wrong based on 48 sessions

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What is the value of a?

A. 20
B. 30
C. 40
D. 60
E. 90

Attachment:

Triangle.png [ 16.26 KiB | Viewed 482 times ]

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Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1195
Location: India
GPA: 3.64
WE: Business Development (Energy and Utilities)
Re: What is the value of a?  [#permalink]

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16 Apr 2018, 00:06
Sum of angles in a triangle is 180 deg.
Hence a+2a+3a =180
Or,6a =180
a =30.

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Joined: 31 Oct 2013
Posts: 951
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: What is the value of a?  [#permalink]

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16 Apr 2018, 01:40
Bunuel wrote:

What is the value of a?

A. 20
B. 30
C. 40
D. 60
E. 90

Attachment:
Triangle.png

we know that the sum of all the angles of a triangle is 180
So, a+2a+3a=180
a=30

Thus, the correct answer is B.
Re: What is the value of a? &nbs [#permalink] 16 Apr 2018, 01:40
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