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25 Aug 2008, 07:04
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A machine begins pouring corn into an open silo at a constant rate of 3 cubic meters per minute. At the same time, a painter begins painting the outside wall of the silo. If the silo has the shape of a right circular cylinder with an inner wall radius of 5 meters and an outer wall radius of 6 meters, will the silo be filled to capacity with corn before the surface of the outside wall is completely painted?
(1) The painter paints at a constant rate of 1 square meter per minute.
(2) The height of the silo is 18 meters.
(1) The painter paints at a constant rate of 1 square meter per minute.
(2) The height of the silo is 18 meters.
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25 Aug 2008, 07:27
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hs = height corn filled in a minute
w*l*hs =3 --> hs = 3/(5*6) = 1/10
(1) The painter paints at a constant rate of 1 square meter per minute.
hp = height painter paints in a minute
2(w*hp+l*hp) = 1
--> ( 2(5*hp+6*hp)=1
hp= 1/22
will the silo be filled to capacity with corn before the surface of the outside wall is completely painted?
Yes .. hs > hp
Sufficient
(2) The height of the silo is 18 meters
Insuffcient.. We don't the rate at which painting..
A
What is OA.
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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
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Thank you for understanding, and happy exploring!
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