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# pls help

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A bicycle is classified by the diameter of its tires. For example, a 20-inch bicycle has tires that are 20 inches in diameter. The number of times a bicycle tire rotates in a given period of time is directly related to the distance traveled in that period of time. A 26-inch bicycle is pedaled so that the tires rotate at a rate of 200 revolutions per minute. A 20-inch bicycle is pedaled so that its tires rotate at a rate of 200 revolutions per minute, as well. How many complete rotations does either bike complete in one second? Answer in a complete sentence.

Jun 8, 2021

#1
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Hi double mnk,

Both tires are rotating at the same rotational speed.

200 revolutions per minute

that is :

200 revolutions EVERY minute.

There are 60 seconds in a minute so in a second the bike would have to travel a lot less distance ... so DIVIDE  (by 60 of course)

How many revolutions would it be in a second then?

Can you tell me now?  They want an exact answer,  don't round it off.

Jun 9, 2021
edited by Melody  Jun 9, 2021
#2
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You could be smart and say the bike does not rotate at all. only the wheels rotate.  LOL Melody  Jun 9, 2021
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That would be 10/3 revolutions.

They ask for complete revolutions in the question so my main question is if there are 3 complete revolutions or 10/3 complete revolutions?

mnkmnk  Jun 9, 2021
#4
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I think I would say:

Each of the 2 wheels will do 3 and 1/3 revolutions each second so rounded down to full rotations that would be 3 rotations per second.

My pic got blocked.  Even moderators am not immune LOL.

Melody  Jun 10, 2021
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I will try to make a new rotating bike Jun 10, 2021
#6
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Ha Ha!! Thank you so much!

mnkmnk  Jun 10, 2021