GRE Prep 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.
The amount of gas in a gas storage tank is halved by draining 15 gallo
[#permalink]
13 Apr 2022, 02:00
13 Apr 2022, 02:00
1
Expert Reply
1
Bookmarks
00:00
Question Stats:
81% (00:45) correct
18% (00:43) wrong based on 33 sessions
Hide Show timer Statistics
The amount of gas in a gas storage tank is halved by draining 15 gallons of gas from it. If p gallons of gas are then added to the tank, how many gallons of gas are there in the storage tank?
A. 15 + p
B. 30 - p
C. 30 + p
D. 2p - 30
E. p - 15
A. 15 + p
B. 30 - p
C. 30 + p
D. 2p - 30
E. p - 15
Part of the project: GRE Quantitative Reasoning Daily Challenge - (2022) EDITION
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: The amount of gas in a gas storage tank is halved by draining 15 gallo
[#permalink]
13 Apr 2022, 09:04
13 Apr 2022, 09:04
1
Carcass wrote:
The amount of gas in a gas storage tank is halved by draining 15 gallons of gas from it. If p gallons of gas are then added to the tank, how many gallons of gas are there in the storage tank?
A. 15 + p
B. 30 - p
C. 30 + p
D. 2p - 30
E. p - 15
A. 15 + p
B. 30 - p
C. 30 + p
D. 2p - 30
E. p - 15
Part of the project: GRE Quantitative Reasoning Daily Challenge - (2022) EDITION
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
Given: The amount of gas in a gas storage tank is halved by draining 15 gallons of gas from it.
If half of the volume of was removed, then half of the volume remains.
So if 15 gallons of gas were removed, then 15 gallons of gas remain.
If we add an additional p gallons of gas to the tank, the resulting volume = 15 + p
Answer: A
The amount of gas in a gas storage tank is halved by draining 15 gallo
[#permalink]
03 May 2022, 03:11
03 May 2022, 03:11
1
How are we assuming that we initially have 30 gallons out of which 15 were utilized? What if there were 20 Gallons initially which remains 5 Gallons out of it?
[/quote]
Given: The amount of gas in a gas storage tank is halved by draining 15 gallons of gas from it.
Let's use your number.
If 20 gallons were initially in the tank, and we remove 15 gallons, then 5 gallons remain.
So we went from 20 gallons to 5 gallons which means the volume of gas is quartered (not halved).
Conversely, if 30 gallons were initially in the tank, and we remove 15 gallons, then 15 gallons remain.
So we went from 30 gallons to 15 gallons which means the volume of gas is halved. Perfect
[/quote]
Given: The amount of gas in a gas storage tank is halved by draining 15 gallons of gas from it.
Let's use your number.
If 20 gallons were initially in the tank, and we remove 15 gallons, then 5 gallons remain.
So we went from 20 gallons to 5 gallons which means the volume of gas is quartered (not halved).
Conversely, if 30 gallons were initially in the tank, and we remove 15 gallons, then 15 gallons remain.
So we went from 30 gallons to 15 gallons which means the volume of gas is halved. Perfect
