Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
31 Jul 2016, 03:08
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
57% (01:52) correct
43%
(02:03)
wrong
based on 170
sessions
History
Date
Time
Result
Not Attempted Yet
In a trapezium ABCD, AB is parallel to DC, AB = 3*DC, and the diagonals of the trapezium intersect at O. The ratio of the area of ∆OCD to the area of ∆OAB is:
(A) 1:9
(B) 1:3
(C) 3:1
(D) 1:10
(E) Cannot be determined
(A) 1:9
(B) 1:3
(C) 3:1
(D) 1:10
(E) Cannot be determined
akshay1301
Joined: 11 Jan 2015
Last visit: 24 Jun 2022
Posts: 7
Given Kudos: 57
Location: India
Schools: Tepper '21 (S) Desautels '21 Rotman '21 (II)
GMAT 1: 720 Q50 V38
GPA: 2.9
14 Apr 2017, 02:13
Kudos
Bookmarks
inshor
In Triangle AOB and Triangle COD
Angle AOB = Angle COD (Vertical Angles)
Other two angles are formed between a pair of parallel line AB || DC
Angle BAO = Angle DCO (Alternate interior angle)
Angle ABO = Angle CDO (Alternate interior angle)
Therefore, by AAA Property the two triangle are similar
The ratio of a side is already given, i.e. 1:3
The ratio of their areas will be square of the ratio of their sides (Property of similar triangles)
Ans - 1^2 : 3^2 = 1:9
In Triangle AOB and Triangle COD
Angle AOB = Angle COD (Vertical Angles)
Other two angles are formed between a pair of parallel line AB || DC
Angle BAO = Angle DCO (Alternate interior angle)
Angle ABO = Angle CDO (Alternate interior angle)
Therefore, by AAA Property the two triangle are similar
The ratio of a side is already given, i.e. 1:3
The ratio of their areas will be square of the ratio of their sides (Property of similar triangles)
Ans - 1^2 : 3^2 = 1:9
General Discussion
hsbinfy
Joined: 02 Mar 2012
Last visit: 13 Nov 2017
Posts: 190
Own Kudos:
Given Kudos: 4
Schools: Schulich '16
31 Jul 2016, 03:56
Kudos
Bookmarks
triangles are similar , so ratio will be 1:9
A
A
