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May 10th, 2016, 08:48 AM   #1
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Unhappy Radius of a cylinder - help please

There are two cylinders
Cylinder A and Cylinder B.
There is also a hollow hole that has the same radius as cylinder A.

Cylinder A weighs 100kg.
Cylinder B is lighter and smaller than cylinder A.

Both cylinders have the same thickness.

When the edge of Cylinder B is just past the centre of the hole (that has the same radius as Cylinder A) it falls inside the hole.

QUESTIONS:
1) What is the radius of cylinder A?
2) What is the weight of cylinder B?


PS: the question does not give any other numerical values to work with
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May 10th, 2016, 08:57 AM   #2
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It seems that some clarification is needed. What is the 'thickness' of a cylinder? and what do you mean by 'just past' the centre of the hole?
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May 10th, 2016, 09:36 AM   #3
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Quote:
Originally Posted by Hostus View Post
Cylinder B is lighter and smaller than cylinder A.
Smaller how? Area? Volume?
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May 10th, 2016, 09:53 AM   #4
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The question just says thickness.
I'm assuming it refers to the height of the cylinder.

Last edited by skipjack; May 10th, 2016 at 10:38 AM.
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May 10th, 2016, 09:54 AM   #5
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Smaller in area of the circle. Hence the volume would be less. And lighter in mass
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May 10th, 2016, 10:00 AM   #6
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Too many "assumes" for me. Qwerty will solve that in a jiffy for you
Assuming the jiffy is less in volume than cylinder B's weight...
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