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04 Jan 2024, 19:22
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Question
Two cars, S and T, each traveled a distance of 50 miles. Did car S use more gasoline than car T ?
(1) Cars S and T traveled the entire distance at the rates of 55 miles per hour and 50 miles per hour, respectively.
(2) For the entire distance, car S traveled 20 miles per gallon of gasoline and car T traveled 25 miles per gallon of gasoline.
A - Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B - Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C - BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D - EACH statement ALONE is sufficient.
E - Statements (1) and (2) TOGETHER are NOT sufficient.
Solution
Solution: The correct answer is B.
From statement (1), it can be determined only that T traveled more slowly and thus took more time to make the trip than S. Therefore, the answer must be B, C, or E. From statement (2), it can be determined that S traveled fewer miles per gallon and thus used more gasoline to travel the same distance than T .
I don't understand the solution, because when a car travels faster, it burns more fuel and has less fuel economy - super confusing.
Two cars, S and T, each traveled a distance of 50 miles. Did car S use more gasoline than car T ?
(1) Cars S and T traveled the entire distance at the rates of 55 miles per hour and 50 miles per hour, respectively.
(2) For the entire distance, car S traveled 20 miles per gallon of gasoline and car T traveled 25 miles per gallon of gasoline.
A - Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B - Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C - BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D - EACH statement ALONE is sufficient.
E - Statements (1) and (2) TOGETHER are NOT sufficient.
Solution
Solution: The correct answer is B.
From statement (1), it can be determined only that T traveled more slowly and thus took more time to make the trip than S. Therefore, the answer must be B, C, or E. From statement (2), it can be determined that S traveled fewer miles per gallon and thus used more gasoline to travel the same distance than T .
I don't understand the solution, because when a car travels faster, it burns more fuel and has less fuel economy - super confusing.
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Siak0730
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04 Jan 2024, 21:26
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danielpincente
Hie there
While solving Ds questions, I follow as below; it helps a lot considering the fact that ds in GFE are more data based with lot of info.
Given:
Car S travelled 50 miles
Car T travelled 50 miles
Asked: gasoline used by car S Is greater than gasoline used by car T??
Statment 1: Cars S and T traveled the entire distance at the rates of 55 miles per hour and 50 miles per hour, respectively.
All we know is average speed of Car S and Car T.
Can we calculate anything about gasoline usage of BOTH Cars or can find the difference between gasoline usage of both cars.
Answer No
Insufficient
Hence, A and D ruled out
Remaining options B, C and E
Statement 2: For the entire distance, car S traveled 20 miles per gallon of gasoline and car T traveled 25 miles per gallon of gasoline
Notice the first few words:
"For the entire distance"
It implies for the whole 50 miles which is the distance travelled by both car S and T.
Next is
Car S travelled 20 miles per gallon
So what does this mean
It means
Car S has travelled total of 50 miles
And for every 20 miles it consumed 1 gallon of gasoline
So total gasoline used = 50/20 = 2.5 gallon
Similarly,
Car T travelled 25 miles per gallon
So total gasoline used by car T is
50/25 = 2 gallons
Basically,
What we are doing is similar to
Distance speed time
Or
Work, rate, time
All we did is
We have total distance and
Rate at which gasoline is consumed (catch is consumption is km/ltr)
So we need total distance and rate of consumption (km/ltr) to determine
Total consumption
Answer hence B
Posted from my mobile device
05 Jan 2024, 00:07
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danielpincente
Hello there,
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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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