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 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.
13 Feb 2018, 22:45
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
91% (00:33) correct
9%
(00:46)
wrong
based on 82
sessions
History
Date
Time
Result
Not Attempted Yet
A rectangle is 40 inches long. What is its area?
(1) Its perimeter is 140 inches.
(2) The length of the diagonal is 50 inches.
(1) Its perimeter is 140 inches.
(2) The length of the diagonal is 50 inches.
14 Feb 2018, 01:06
Kudos
Bookmarks
Length= 40 inches. We need breadth in order to find its area
(1) 2 (L+B) =140; Put L= 40 in the equation and breadth can be calculated. [Suff]
(2 \(L^2\)+ \(B^2\)= \((50)^2\)= 2500; Put L= 40 in the equation and breadth can be calculated. [Suff]
Both statements are sufficient to find area.
Answer: D.
(1) 2 (L+B) =140; Put L= 40 in the equation and breadth can be calculated. [Suff]
(2 \(L^2\)+ \(B^2\)= \((50)^2\)= 2500; Put L= 40 in the equation and breadth can be calculated. [Suff]
Both statements are sufficient to find area.
Answer: D.
16 Feb 2018, 13:03
Kudos
Bookmarks
Bunuel
Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.
In geometry, a rectangle has two variables which are a length \(l\) and a width \(w\).
From the original condition, since we have two variables a length \(l\) and a width \(w\) and we know the length \(l = 40\), D is most likely to be the answer.
Condition 1)
\(2(l+w) = 140\)
\(l+w = 70\)
\(w = 30\)
The area is \(l*w = 40*30 = 1200\).
The condition 2) is sufficient.
Condition 2):
\(l^2 + w^2 = 50^2\)
\(1600 + w^2 = 2500\)
\(w^2 = 900\)
\(w = 30\)
The area is \(l*w = 40*30 = 1200\).
The condition 2) is sufficient too.
Therefore the answer is D.
If the original condition includes “1 variable”, or “2 variables and 1 equation”, or “3 variables and 2 equations” etc., one more equation is required to answer the question. If each of conditions 1) and 2) provide an additional equation, there is a 59% chance that D is the answer, a 38% chance that A or B is the answer, and a 3% chance that the answer is C or E. Thus, answer D (conditions 1) and 2), when applied separately, are sufficient to answer the question) is most likely, but there may be cases where the answer is A,B,C or E.
