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If a certain wheel turns at a constant rate of x revolutions per minut

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Ryerson (Ted Rogers) Thread Master
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If a certain wheel turns at a constant rate of x revolutions per minut  [#permalink]

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New post 23 Dec 2015, 15:30
1
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A
B
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E

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Question Stats:

78% (00:47) correct 22% (00:55) wrong based on 177 sessions

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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) \(\frac{kx}{60}\)

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Re: If a certain wheel turns at a constant rate of x revolutions per minut  [#permalink]

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New post 26 Dec 2015, 10:03
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...

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Re: If a certain wheel turns at a constant rate of x revolutions per minut  [#permalink]

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New post 03 Dec 2017, 18:45
1
RSOHAL wrote:
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) \(\frac{kx}{60}\)


Since k seconds is k/60 minutes, the wheel will make x * k/60 = xk/60 revolutions in k seconds.

Answer: E
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Re: If a certain wheel turns at a constant rate of x revolutions per minut &nbs [#permalink] 03 Dec 2017, 18:45
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