|
|
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.
25 Nov 2003, 23:26
Kudos
Bookmarks
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
0% (00:00) correct
0%
(00:00)
wrong
based on 2
sessions
History
Date
Time
Result
Not Attempted Yet
It takes 3.5 hours for Mathew to row a distance of X km up the stream. Find his speed in still water.
(1) It takes him 2.5 hours to cover the distance of X km downstream.
(2) He can cover a distance of 84 km downstream in 6 hours.
A. Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
B. Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
C. BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
D. Each Statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
(1) It takes him 2.5 hours to cover the distance of X km downstream.
(2) He can cover a distance of 84 km downstream in 6 hours.
A. Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
B. Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
C. BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
D. Each Statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
v-- speed in still water
w--speed of stream
3.5=X/(v-w)
(1) 2.5=X/(v+w). If we need a numerical value, it is not suff, 3 variables and 2 equations
(2) 6=86/(v+w), not suff again
combine: 3 variables and 3 equations, suff
I opt for C.
w--speed of stream
3.5=X/(v-w)
(1) 2.5=X/(v+w). If we need a numerical value, it is not suff, 3 variables and 2 equations
(2) 6=86/(v+w), not suff again
combine: 3 variables and 3 equations, suff
I opt for C.
26 Nov 2003, 01:32
Kudos
Bookmarks
if he can cover X km upstream, for 3,5 hours we can find his speed upstream, if it takes him 2,5 hours to cover X km we can find his speed downstream, or if we have upstream (v-c) and dounstream (v+c) from (v+c)-(v-c)=2c or we can find the speed of the current and respectively the speed in still water so A is sufficient
From B we can find his speed 84/6=14 km/h but we do not know X so B is insufficient
Using A and the initial statement, we can conclude that:
X=3.5(v-w)=2.5(v+w)
or v=6w
what is the numerical value?
From B we can find his speed 84/6=14 km/h but we do not know X so B is insufficient
Using A and the initial statement, we can conclude that:
X=3.5(v-w)=2.5(v+w)
or v=6w
what is the numerical value?
