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16 Jun 2022, 17:30
Kudos
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
48% (01:55) correct
52%
(01:36)
wrong
based on 54
sessions
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Time
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Not Attempted Yet
A bicycle with two wheels of different sizes moves at 3 meters per second, at how many rotations per second does the smaller wheel rotate?
(1) The smaller wheel is 0.5 m wide in diameter.
(2) The larger wheel is twice as wide in diameter, and rotates at \(\frac{3}{\pi}\) rotations per second.
Are You Up For the Challenge: 700 Level Questions
(1) The smaller wheel is 0.5 m wide in diameter.
(2) The larger wheel is twice as wide in diameter, and rotates at \(\frac{3}{\pi}\) rotations per second.
Are You Up For the Challenge: 700 Level Questions
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
18 Jun 2022, 12:35
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Bunuel
Breaking Down the Info:
In order to find rotations per second, we need to divide the linear speed by the circumference. Hence if both wheels are moving a 3 meters per second, the smaller wheel has to rotate faster since it has a smaller circumference. Then we would like to know the radius of the circumference of the smaller wheel.
Statement 1 Alone:
This gives us the radius, sufficient.
Statement 2 Alone:
This gives us the radius/circumference of the larger wheel, then we can divide by 2 to find the radius/circumference of the smaller wheel. Sufficient.
Answer: D
09 Feb 2024, 21:39
Kudos
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