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23 Dec 2015, 15:30
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
81% (00:47) correct
19%
(01:06)
wrong
based on 536
sessions
History
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Not Attempted Yet
If a certain wheel turns at a constant rate of x revolutions per minute, how many revolutions will the wheel make in k seconds?
(A) \(60kx\)
(B) \(kx\)
(C) \(\frac{x}{k}\)
(D) \(\frac{x}{60k}\)
(E) \(\frac{kx}{60}\)
(A) \(60kx\)
(B) \(kx\)
(C) \(\frac{x}{k}\)
(D) \(\frac{x}{60k}\)
(E) \(\frac{kx}{60}\)
26 Dec 2015, 10:03
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Hi All,
This question can be solved algebraically or by TESTing VALUES.
We're told that a wheel turns at a constant rate of X revolutions per MINUTE. We're asked for the number of revolutions the wheel makes in K SECONDS.
IF....
X = 10 revolutions per minute = 10 revolutions per 60 seconds = 1 revolution per 6 seconds
K = 6 seconds
The wheel will turn 1 revolution in 6 seconds.
So we're looking for an answer that equals 1 when X = 10 and K = 6. There's only one answer that matches...
Final Answer:
GMAT assassins aren't born, they're made,
Rich
This question can be solved algebraically or by TESTing VALUES.
We're told that a wheel turns at a constant rate of X revolutions per MINUTE. We're asked for the number of revolutions the wheel makes in K SECONDS.
IF....
X = 10 revolutions per minute = 10 revolutions per 60 seconds = 1 revolution per 6 seconds
K = 6 seconds
The wheel will turn 1 revolution in 6 seconds.
So we're looking for an answer that equals 1 when X = 10 and K = 6. There's only one answer that matches...
Final Answer:
GMAT assassins aren't born, they're made,
Rich
03 Dec 2017, 18:45
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RSOHAL
Since k seconds is k/60 minutes, the wheel will make x * k/60 = xk/60 revolutions in k seconds.
Answer: E
