QUESTION: 277

V is the volume of a cylinder; the radius of the cylinder is 3.4. The height of the cylinder is 550% more than the radius. Which of the following is true?

100 < V < 300
300 < V < 500
500 < V < 700
700 < V < 900
900 < V < 1100

Answer(s): D

Explanation:

You can start with the length. Length = 6.5 x 3.4 is approximately 22. The Volume of the cylinder is the area of its face x its length.
Area of face = .
V is approximately 36 x 22 = 792 and the best answer is D.

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QUESTION: 278

Two trains are traveling on a collision course. If train A is traveling at a speed of 350 mph and train B is traveling 28% slower, how much time will it take the trains to collide if the initial distance between the two is 1505 miles?

Two hours and 30 minutes.
One hour and 10 minutes.
Two hours and 25 minutes.
Three hours and 15 minutes.
Four hours and 20 minutes.

Answer(s): A

Explanation:

Train B is traveling at a speed of 0.72 x 350 = 252 mph.
The two trains are traveling in opposite directions. Thus, the distance should be divided by the sum of their speeds = 252 + 350 = 602 mph.
1505 miles / 602 = 2.5 = two hours and 30 minutes.

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QUESTION: 279

Two cars are traveling towards each other. If car A is traveling at a speed of 50 mph and car B is traveling 12% slower, how much time will it take the cars to meet if the initial distance between the two is 705 miles?

Six hours and 30 minutes.
Seven hours and 30 minutes.
Eight hours and 20 minutes.
Nine hours and 15 minutes.
Ten hours and 20 minutes.

Answer(s): B

Explanation:

Car B is traveling at a speed of 0.82 x 50 = 44 mph.
The cars are traveling in opposite directions. Thus, the distance should be divided by the sum of their speeds = 50 + 44 = 94 mph.
705 miles / 94 = 7.5 = seven hours and 30 minutes.

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QUESTION: 280

Tom and Jerry are running on the same road towards each other. If Tom is running at a speed of 2.5 meters per second and Jerry is running 36% slower, how much time will it take them to meet if the initial distance between the two is 50 meters and Tom started running 20 seconds before Jerry did?

2 minute and 12 seconds.
two minutes.
44 seconds.
20 seconds.
12 seconds.

Answer(s): D

Explanation:

Jerry is running at a speed of 0.64 x 2.5 = 1.6 meters per second.
Tom runs alone a distance of 2.5 x 20 = 50 meters. Tom caught Jerry off-guard and Jerry didn’t even start running.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 70)

QUESTION: 277

Explanation:

QUESTION: 278

Explanation:

QUESTION: 279

Explanation:

QUESTION: 280

Explanation: