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.
06 Aug 2017, 00:54
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
75% (01:17) correct
25%
(01:19)
wrong
based on 244
sessions
History
Date
Time
Result
Not Attempted Yet
A few taps, numbered 1, 2, 3 . . . , are connected to a tank, each having a distinct rate of filling the tank. What is time taken to fill the tank by the 4th tap alone?
(1) The rate of filling of each tap, starting from the second tap, is double the efficiency of the previous tap.
(2) The time taken by the first five taps, working together, to fill the tank is 1 hour.
(1) The rate of filling of each tap, starting from the second tap, is double the efficiency of the previous tap.
(2) The time taken by the first five taps, working together, to fill the tank is 1 hour.
06 Aug 2017, 01:35
Kudos
Bookmarks
Let the Rate of \(Tap 1= \frac{1}{R_1}, Tap 2= \frac{1}{R_2}, Tap 3= \frac{1}{R_3}, Tap 4= \frac{1}{R_4}, Tap 5= \frac{1}{R_5}\)
Statement (1) The rate of filling of each tap, starting from the second tap, is double the efficiency of the previous tap.
This statement only gives the relationship between the rates of the different Taps. There is no information related to time. This statement is not sufficient.
Statement (2) The time taken by the first five taps, working together, to fill the tank is 1 hour.
(\(\frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + \frac{1}{R_4} + \frac{1}{R_5}\)) * 1 = 1
As we do not have any further information pertaining to the relationship between the rates of individual taps, this statement is not sufficient.
Combining both the statements we have the relationship between the individual rates, as well as the time taken by the 5 taps together. Using both the statements together is sufficient.
Answer is C
Statement (1) The rate of filling of each tap, starting from the second tap, is double the efficiency of the previous tap.
This statement only gives the relationship between the rates of the different Taps. There is no information related to time. This statement is not sufficient.
Statement (2) The time taken by the first five taps, working together, to fill the tank is 1 hour.
(\(\frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + \frac{1}{R_4} + \frac{1}{R_5}\)) * 1 = 1
As we do not have any further information pertaining to the relationship between the rates of individual taps, this statement is not sufficient.
Combining both the statements we have the relationship between the individual rates, as well as the time taken by the 5 taps together. Using both the statements together is sufficient.
Answer is C
06 Aug 2017, 02:37
Kudos
Bookmarks
Using statement 1: We can assume the efficiency of each tap as x,2x,4x,8x,16x and so on (Geometric Progression).This alone is not sufficient to answer the question.
Statement 2 also doesn't give us anything.But on combining we bot 1 and 2.we get finite GP series and using that we can find x.So the answer will be C.
Statement 2 also doesn't give us anything.But on combining we bot 1 and 2.we get finite GP series and using that we can find x.So the answer will be C.
