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What is the value of a?

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Senior Manager
Joined: 25 Dec 2018
Posts: 307
Location: India
Concentration: General Management, Finance
GMAT Date: 02-18-2019
GPA: 3.4
WE: Engineering (Consulting)
What is the value of a?  [#permalink]

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06 Apr 2019, 05:58
00:00

Difficulty:

55% (hard)

Question Stats:

53% (01:23) correct 47% (01:45) wrong based on 15 sessions

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What is the value of a?

(1) The area of an equilateral triangle of side length 3a units is 9√3 square units

(2) The area of an isosceles triangle whose sides are of length 4a, 4a and a units is 3√7 square units
Senior Manager
Joined: 25 Feb 2019
Posts: 287
Re: What is the value of a?  [#permalink]

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06 Apr 2019, 06:14
IMO D

from statement 1

√3/4*(3a)^2 = 9√3 , calculate a

sufficient

statemwmt 2

calculate the Area using Hero's formula and equate to 3√7 , we can find a

Each statement is sufficinent

IMO D

award kudos if helpful

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Manager
Joined: 10 Oct 2018
Posts: 177
Location: United States
GPA: 4
WE: Human Resources (Human Resources)
Re: What is the value of a?  [#permalink]

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06 Apr 2019, 06:20
This is how I solved. IMO answer is option D.
(Please correct me if I made any error.)

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Re: What is the value of a?   [#permalink] 06 Apr 2019, 06:20
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What is the value of a?

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