BC = 1/3 AB
Area of triangle ABC= 1/2 base * height = 6
= 1/2 * 1/3 AB * AB =6
= 1/3 AB^2 = 12
AB^2 = 36
AB = 6
BC = 1/3 AB = 1/3 * 6 = 2
AC = square root AB^ + BC^2
= square root 6^2 + 2^2
= square root 40
= 2 square root 10
Answer is E
BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course
Redeem
Featured Course
Target Test Prep GMAT OnDemand
Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.
- 715+ score guarantee — highest in the industry (99th percentile)
- 52 chapters · 1,500+ lessons · 4,000+ practice questions
- 400 hours of video · 1,500+ instructor-led HD smartboard lessons
- 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
- 24/7 live support + weekly Zoom office hours with GMAT instructors
- TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
- 1,200+ flashcards + AI-powered study assistant & daily calendar
- OnDemand, LiveTeach & GMAT Bootcamp formats available
- Also: GRE, SAT Math & Executive Assessment courses
- MBA Admissions Consulting now available
- 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
- 200,000+ students served
- 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★
5.0
(559 reviews)
130-pt guarantee
$0 to start
then $127/mo
Geometry
Source: Beat The GMAT — Problem Solving |
area = 6.
(1/2)*AB*BC=6
ab*ab/3 = 12 -> ab^2 = 36
bc^2 = (ab/3)^2 = 36/9 = 4
ac^2 = ab^2 + bc^2 = 36+4 = 40
ac = 2*root(10)
None of the options is correct ( e is mentioned as root(10) only)
(1/2)*AB*BC=6
ab*ab/3 = 12 -> ab^2 = 36
bc^2 = (ab/3)^2 = 36/9 = 4
ac^2 = ab^2 + bc^2 = 36+4 = 40
ac = 2*root(10)
None of the options is correct ( e is mentioned as root(10) only)
If my post helped you- let me know by pushing the thanks button 
Contact me about long distance tutoring!
[email protected]
Cans!!
Contact me about long distance tutoring!
[email protected]
Cans!!
area = 6.
(1/2)*AB*BC=6
ab*ab/3 = 12 -> ab^2 = 36
bc^2 = (ab/3)^2 = 36/9 = 4
ac^2 = ab^2 + bc^2 = 36+4 = 40
ac = 2*root(10)
None of the options is correct ( e is mentioned as root(10) only)
(1/2)*AB*BC=6
ab*ab/3 = 12 -> ab^2 = 36
bc^2 = (ab/3)^2 = 36/9 = 4
ac^2 = ab^2 + bc^2 = 36+4 = 40
ac = 2*root(10)
None of the options is correct ( e is mentioned as root(10) only)
If my post helped you- let me know by pushing the thanks button
Contact me about long distance tutoring!
[email protected]
Cans!!
Contact me about long distance tutoring!
[email protected]
Cans!!
-
aftableo2006
- Senior | Next Rank: 100 Posts
- Posts: 99
- Thanked: 1 times
-
itsmebharat
- Master | Next Rank: 500 Posts
- Posts: 150
- Location: gurgaon
- Thanked: 8 times
IMO E ,
I guess typo error while writing on the forum..
I guess typo error while writing on the forum..
I am not an Expert, please feel free to suggest if there is an error.
