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At the rate of 6,000 revolutions per minute, how many revolutions will

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At the rate of 6,000 revolutions per minute, how many revolutions will [#permalink]

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New post 31 May 2018, 11:54
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Question Stats:

80% (00:30) correct 20% (00:45) wrong based on 69 sessions

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At the rate of 6,000 revolutions per minute, how many revolutions will a wheel make in x seconds?

A. \(6,000x\)

B. \(100x\)

C. \(\frac{100}{x}\)

D. \(\frac{6,000}{x}\)

E. \(\frac{360,000}{x}\)

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At the rate of 6,000 revolutions per minute, how many revolutions will [#permalink]

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New post 31 May 2018, 16:34
Bunuel wrote:
At the rate of 6,000 revolutions per minute, how many revolutions will a wheel make in x seconds?

A. \(6,000x\)

B. \(100x\)

C. \(\frac{100}{x}\)

D. \(\frac{6,000}{x}\)

E. \(\frac{360,000}{x}\)


Speed of rotation:6000 rotation per minute
time : x seconds

total rpm in (x/60) minutes = (6000*60)/x = 360000/x (Option E)
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Re: At the rate of 6,000 revolutions per minute, how many revolutions will [#permalink]

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New post 31 May 2018, 16:47
Bunuel wrote:
At the rate of 6,000 revolutions per minute, how many revolutions will a wheel make in x seconds?

A. \(6,000x\)

B. \(100x\)

C. \(\frac{100}{x}\)

D. \(\frac{6,000}{x}\)

E. \(\frac{360,000}{x}\)



Given : 6,000 revolutions per minute ==> 6,000 revolutions per 60 seconds ==>100 revolutions per second
Hence in x seconds there will be 100x revolutions. Hence I would go for option B.
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Re: At the rate of 6,000 revolutions per minute, how many revolutions will [#permalink]

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New post 01 Jun 2018, 02:45

Solution



Given:
    • A wheel makes 6000 revolutions in every minute

To find:
    • Number of revolutions the wheel make in x seconds

Approach and Working:
    • As the wheel makes 6000 revolutions in a minute or 60 seconds time, in 1 second it will make \(\frac{6000}{60}\) = 100 revolutions
    • Therefore, in x seconds, the wheel will make 100 * x = 100x revolutions

Hence, the correct answer is option B.

Answer: B
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Re: At the rate of 6,000 revolutions per minute, how many revolutions will [#permalink]

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New post 03 Jun 2018, 18:25
Bunuel wrote:
At the rate of 6,000 revolutions per minute, how many revolutions will a wheel make in x seconds?

A. \(6,000x\)

B. \(100x\)

C. \(\frac{100}{x}\)

D. \(\frac{6,000}{x}\)

E. \(\frac{360,000}{x}\)


Since x seconds = x/60 minutes, the number of revolutions made is 6000 * x/60 = 100x revolutions.

Answer: B
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Re: At the rate of 6,000 revolutions per minute, how many revolutions will   [#permalink] 03 Jun 2018, 18:25
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