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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
If a certain wheel turns at a constant rate of x revolutions per minut
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19 Jan 2023, 10:32
19 Jan 2023, 10:32
Expert Reply
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Question Stats:
50% (00:24) correct
50% (00:46) wrong based on 2 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) \(\frac{kx}{60}\)
(A) \(60kx\)
(B) \(kx\)
(C) \(\frac{x}{k}\)
(D) \(\frac{x}{60k}\)
(E) \(\frac{kx}{60}\)
Re: If a certain wheel turns at a constant rate of x revolutions per minut
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21 Jan 2023, 03:08
21 Jan 2023, 03:08
1
Expert Reply
We can solve the question using equivalent ratios
Wheel turns at a constant rate of x revolutions per minute
We can also say the wheel turns at a constant rate of x revolutions per 60 seconds
In other words, # of revolutions/seconds elapsed = x/60
How many revolutions will the wheel make in k seconds?
Let R = the number of revolutions will the wheel make in k seconds
We can now write: x/60 = R/k
To solve for R, we can first cross multiply to get: 60R = kx
Divide both sides by 60 to get: kx/60
Answer: E
Wheel turns at a constant rate of x revolutions per minute
We can also say the wheel turns at a constant rate of x revolutions per 60 seconds
In other words, # of revolutions/seconds elapsed = x/60
How many revolutions will the wheel make in k seconds?
Let R = the number of revolutions will the wheel make in k seconds
We can now write: x/60 = R/k
To solve for R, we can first cross multiply to get: 60R = kx
Divide both sides by 60 to get: kx/60
Answer: E
gmatclubot
Re: If a certain wheel turns at a constant rate of x revolutions per minut [#permalink]
21 Jan 2023, 03:08
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