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

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

The water level in a rectangular swimming pool measuring 60 [#permalink]
08 Mar 2011, 14:08

1

This post received KUDOS

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

45% (medium)

Question Stats:

54% (02:24) correct
46% (01:22) wrong based on 287 sessions

The water level in a rectangular swimming pool measuring 60 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)

Re: Water recession [#permalink]
08 Mar 2011, 14:15

3

This post received KUDOS

Expert's post

tonebeeze wrote:

The water level in a rectangular swimming pool measuring 60 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)

a. 100 b. 250 c. 750 d. 1200 e. 5625

6 inches = 1/2 feet (there are 12 inches in a foot.), so 60*25*1/2=750 feet^3 of water must be removed, which equals to 750*7.5=5625 gallons.

Re: Water recession [#permalink]
21 Apr 2011, 04:22

Volume of the swimming pool where water needs to be lowered = 60 * 25 * 6/12 = 750 cu. ft Water in Gallons that needs to be removed = 750 * 7.5 = 5625 Gallons OA is E _________________

Re: Water recession [#permalink]
10 Apr 2012, 17:49

Bunuel wrote:

tonebeeze wrote:

The water level in a rectangular swimming pool measuring 60 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)

a. 100 b. 250 c. 750 d. 1200 e. 5625

6 inches = 1/2 feet (there are 12 inches in a foot.), so 60*25*1/2=750 feet^3 of water must be removed, which equals to 750*7.5=5625 gallons.

Answer: E.

Can you explain why you multiply by 1/2? The problem doesn't say that you lower the pool by half but only by 6 inches. I would think that you would multiply by 1/2 if the question asked to lower the pool by 12.5 feet. What am i missing. Thank you very much!

Re: Water recession [#permalink]
10 Apr 2012, 23:49

Expert's post

bohdan01 wrote:

Bunuel wrote:

tonebeeze wrote:

The water level in a rectangular swimming pool measuring 60 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)

a. 100 b. 250 c. 750 d. 1200 e. 5625

6 inches = 1/2 feet (there are 12 inches in a foot.), so 60*25*1/2=750 feet^3 of water must be removed, which equals to 750*7.5=5625 gallons.

Answer: E.

Can you explain why you multiply by 1/2? The problem doesn't say that you lower the pool by half but only by 6 inches. I would think that you would multiply by 1/2 if the question asked to lower the pool by 12.5 feet. What am i missing. Thank you very much!

Two dimensions (60 feet and 25 feet) are given in feet, so we should express the third dimension in feet too: 6 inches = 1/2 feet. _________________

Re: Water recession [#permalink]
11 Apr 2012, 17:12

Bunuel wrote:

bohdan01 wrote:

Bunuel wrote:

The water level in a rectangular swimming pool measuring 60 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)

a. 100 b. 250 c. 750 d. 1200 e. 5625

6 inches = 1/2 feet (there are 12 inches in a foot.), so 60*25*1/2=750 feet^3 of water must be removed, which equals to 750*7.5=5625 gallons.

Answer: E.

Can you explain why you multiply by 1/2? The problem doesn't say that you lower the pool by half but only by 6 inches. I would think that you would multiply by 1/2 if the question asked to lower the pool by 12.5 feet. What am i missing. Thank you very much!

Two dimensions (60 feet and 25 feet) are given in feet, so we should express the third dimension in feet too: 6 inches = 1/2 feet.[/quote]

Thanks. To follow up, how do you know what the third dimension is? It could be 10 feet where 6 inches would be 6/120 or it could be 1 foot where 6 inches would be 1/2. I assume you mention the third dimension since we are talking about the volume, but how can we assume anything about the third dimension?

Re: Water recession [#permalink]
11 Apr 2012, 23:20

Expert's post

bohdan01 wrote:

Thanks. To follow up, how do you know what the third dimension is? It could be 10 feet where 6 inches would be 6/120 or it could be 1 foot where 6 inches would be 1/2. I assume you mention the third dimension since we are talking about the volume, but how can we assume anything about the third dimension?

It seems that you misunderstood the question: questions is simple saying that 60*25*1/2=750 feet^3 of water is removed and asks to calculate how much is that in gallons. _________________

Re: The water level in a rectangular swimming pool measuring 60 [#permalink]
12 Feb 2014, 15:35

Bunuel wrote:

fozzzy wrote:

Tricky question! What would be the difficulty level of this question bunuel

Look at the statistics in the original post: 45% answered incorrectly, so I'd say the difficulty level is ~650.

I don't think that in the real test they won't give you the relation feet inches. Even less now considering how many non american citizens are taking the test

Just a quick reflection Cheers! J

gmatclubot

Re: The water level in a rectangular swimming pool measuring 60
[#permalink]
12 Feb 2014, 15:35