BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Tank

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Wed Oct 19, 2011 7:12 pm

Tank

by silverflamein » Mon Nov 07, 2011 7:59 pm
A tank fitted with an inlet takes 1 hr to fill completely. The tap was turned on when the tank was empty. When the tank was half filled , it developed a leak and as a result the tank took 65 minutes to completely fill. As soon as the tank got filled completely, the tap was turned off and the leakage continued. How long will it take for the leakage to empty the tank completely ??
Top
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Mon Nov 07, 2011 8:28 pm
silverflamein wrote:A tank fitted with an inlet takes 1 hr to fill completely. The tap was turned on when the tank was empty. When the tank was half filled , it developed a leak and as a result the tank took 65 minutes to completely fill. As soon as the tank got filled completely, the tap was turned off and the leakage continued. How long will it take for the leakage to empty the tank completely ??
Let us assume that the capacity of the tank is 60 L.

Hence,
Only tap : Entry of 60 L per 60 min = 1 L/min
Tap + Leak : Entry of 30 L per 35 min = 30/35 L/min = 6/7 L/min

Therefore, only leak : Exit of (1 - 6/7) = 1/7 L/min

Thus 1/7 L leaves the tank through the leakage in 1 minute.
--> 60 L leaves the tank through the leakage in 60*7 minutes = 7 hours

Thus, it will take 7 hours for the leakage to empty the tank completely.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
Legendary Member
Posts: 2789
Joined: Tue Jul 26, 2011 12:19 am
Location: Chennai, India
Thanked: 206 times
Followed by:43 members
GMAT Score:640

by GmatKiss » Mon Nov 07, 2011 10:59 pm
silverflamein wrote:A tank fitted with an inlet takes 1 hr to fill completely. The tap was turned on when the tank was empty. When the tank was half filled , it developed a leak and as a result the tank took 65 minutes to completely fill. As soon as the tank got filled completely, the tap was turned off and the leakage continued. How long will it take for the leakage to empty the tank completely ??
Is there any reason for not posting the Q with the answer choices????
what is the source of this question??
Top
Post new topic Post Reply
• Page 1 of 1