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The water level in rectangular swimming pool measuring 60 feet by 25

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The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 06 Dec 2017, 03:22
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The water level in 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 cubic foot = 7.5 gallons and 1 foot = 12 inches)

(A) 100
(B) 250
(C) 750
(D) 1,200
(E) 5,625
[Reveal] Spoiler: OA

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Re: The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 06 Dec 2017, 03:50
Bunuel wrote:
The water level in 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 cubic foot = 7.5 gallons)

(A) 100
(B) 250
(C) 750
(D) 1,200
(E) 5,625


Hi Bunuel,

Should it be "lowered by 6 inches feet?..Please correct me if i am wrong
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Re: The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 06 Dec 2017, 03:55
Luckisnoexcuse wrote:
Bunuel wrote:
The water level in 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 cubic foot = 7.5 gallons)

(A) 100
(B) 250
(C) 750
(D) 1,200
(E) 5,625


Hi Bunuel,

Should it be "lowered by 6 inches feet?..Please correct me if i am wrong


I think all is correct there.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 06 Dec 2017, 04:00
Bunuel wrote:
The water level in 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 cubic foot = 7.5 gallons and 1 foot = 12 inches)

(A) 100
(B) 250
(C) 750
(D) 1,200
(E) 5,625


6 inch = 0.5 foot

Volume removed = 60 * 25 * 0.5 = 750 cubic foot
In gallons = 750 * 7.5 = 5625 Gallons

E
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Re: The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 06 Dec 2017, 06:57
6 inch = 1/2 foot

Volume to be removed = 60 * 25 /2 = 750 cubic foot
In gallons = 750 * 7.5 = 5625 Gallons

Hence, answer is E
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Re: The water level in rectangular swimming pool measuring 60 feet by 25 [#permalink]

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New post 08 Dec 2017, 12:40
Volume drop in cubic feet= 60x25x0.5 = 750 cubic feet.

Given, one cubic feet= 7.5 gallons.

Therefore, 750 cubic feet= 750x7.5= 5625 gallons.

Ans E

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Re: The water level in rectangular swimming pool measuring 60 feet by 25   [#permalink] 08 Dec 2017, 12:40
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