|
|
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.
18 Jan 2019, 01:12
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:
74% (01:04) correct
26%
(00:50)
wrong
based on 207
sessions
History
Date
Time
Result
Not Attempted Yet
A hose fills an empty tank with water at a rate of 15 liters/second. At the same time, water drains from the tank at a rate of 10 liters/second. If the tank has a capacity of 200 liters, in how many seconds will the tank be half full?
A 4
B 8
C 20
D 25
E 40
A 4
B 8
C 20
D 25
E 40
Archit3110
Major Poster
Updated on: 19 Jan 2019, 03:04
Originally posted by Archit3110 on 18 Jan 2019, 09:44.
Last edited by Archit3110 on 19 Jan 2019, 03:04, edited 1 time in total.
Last edited by Archit3110 on 19 Jan 2019, 03:04, edited 1 time in total.
Kudos
Bookmarks
Bunuel
relative rate for tank being filled and getting emptied = 15-10 = 5
so work 200; half tank 100
100/5 = time = 20 sec
IMO C
18 Jan 2019, 22:30
Kudos
Bookmarks
Read carefully
15L/1 second - 10L/1 second = 5L/1 second
200L tank HALF FULL
So, consider it a 100L Tank
100L/(5L/1 second)=(100L/1)/(5L/1 second)=100L·1second/1·5L
Cancel the Litres unit
100·1second/1·5=20 seconds
C
15L/1 second - 10L/1 second = 5L/1 second
200L tank HALF FULL
So, consider it a 100L Tank
100L/(5L/1 second)=(100L/1)/(5L/1 second)=100L·1second/1·5L
Cancel the Litres unit
100·1second/1·5=20 seconds
C
