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

Redeem

Empty pool filling question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
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 » Sat May 26, 2012 2:13 am
sohailmbaprep wrote:Q) An empty pool being filled with water at a constant rate takes 8 hours to fill to 3/5 of its capacity.How much more time will it take to finish filling the pool?
It is given that pool is filled to 3/5 of its capacity.
So, remaining capacity of the pool = 1 - 3/5 = 2/5

3/5 of the pool can be filled in 8 hours.
So, 2/5 of the pool can be filled in 8/(3/5) * 2/5 = 16/3 hours = 5 hours 20 minutes
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

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 » Sat May 26, 2012 2:19 am
sohailmbaprep wrote:Q) An empty pool being filled with water at a constant rate takes 8 hours to fill to 3/5 of its capacity.How much more time will it take to finish filling the pool?
We can also solve this using the picking numbers approach:

Let us assume that the capacity of the pool = 10 liters
Now 3/5 of the pool can be filled in 8 hours or (3/5) * 10 = 6 liters can be filled in 8 hours.
So, the rate at which the pool in being filled = 6/8 or 3/4 liters per hour.
Remaining capacity of pool to be filled = 1- - 6 = 4 liters
Therefore, time needed to fill 4 liters of the pool = 4/(3/4) = 16/3 hours = 5 hours 20 minutes.
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
User avatar
Master | Next Rank: 500 Posts
Posts: 385
Joined: Mon Apr 16, 2012 8:40 am
Location: Pune, India
Thanked: 186 times
Followed by:29 members

by aneesh.kg » Sat May 26, 2012 2:20 am
sohailmbaprep wrote:Q) An empty pool being filled with water at a constant rate takes 8 hours to fill to 3/5 of its capacity.How much more time will it take to finish filling the pool?
(2/5)th of the tank remains to be filled.

Time taken to fill (3/5)th of the tank = 8 hours
Time taken to fill the entire tank = 8/(3/5) hours
Time taken to fill (2/5)th of the tank
= (8)*(2/5)/(3/5) hours
= (8)*(2/3) hours
= [spoiler]16/3[/spoiler] hours
= 5 hours 20 minutes
Aneesh Bangia
GMAT Math Coach
[email protected]

GMATPad:
Facebook Page: https://www.facebook.com/GMATPad
Top
Senior | Next Rank: 100 Posts
Posts: 59
Joined: Thu Feb 23, 2012 11:18 pm

by sohailmbaprep » Sat May 26, 2012 6:38 am
Thank you all
Top
Post new topic Post Reply
• Page 1 of 1