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At the rate of 3,000 revolutions per minute, how many revolu [#permalink]
Expert's post 00:00

Question Stats: 75% (00:32) correct 25% (00:58) wrong based on 16 sessions
At the rate of 3,000 revolutions per minute, how many revolutions will a wheel make in k seconds?

A. $$3,000k$$

B. $$50k$$

C. $$\frac{50}{k}$$

D. $$\frac{3,000}{k}$$

E. $$\frac{180,000}{k}$$
[Reveal] Spoiler: OA

_________________ Director Joined: 20 Apr 2016
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WE: Engineering (Energy and Utilities)
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Re: At the rate of 3,000 revolutions per minute, how many revolu [#permalink]
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Carcass wrote:
At the rate of 3,000 revolutions per minute, how many revolutions will a wheel make in k seconds?

A. $$3,000k$$

B. $$50k$$

C. $$\frac{50}{k}$$

D. $$\frac{3,000}{k}$$

E. $$\frac{180,000}{k}$$

As the wheel makes 3000 revolutions in a minute or 60 seconds time,

So in 1 second it will make =$$\frac{3000}{60} = 50 rev$$

Therefore, in k seconds, the wheel will make = $$50 * k = 50k rev$$
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