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January 14th, 2011, 08:18 AM | #1 |
Newbie Joined: Jan 2011 Posts: 17 Thanks: 0 | Surface area and volume
Gas is being pumped into a spherical balloon at the rate of 100 cubic centimeter per min. When the radius is 10 cm, the surface area changed at a rate of ??? ANS - 20 square centimeter per minute Thanx for reading |
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January 14th, 2011, 09:08 AM | #2 |
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,912 Thanks: 1110 Math Focus: Elementary mathematics and beyond | Re: Surface area and volume Formula for volume of sphere: Formula for surface area of sphere: With radius at 10 cm., calculate dr/dt using derivative of formula for volume: With radius at 10 cm., calculate ds/dt using derivative of formula for surface area: |
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January 14th, 2011, 09:18 AM | #3 |
Senior Member Joined: Jan 2009 Posts: 344 Thanks: 3 | Re: Surface area and volume
This should be in calculus not in geometry substituting 10cm for r we have |
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January 14th, 2011, 12:30 PM | #4 | |
Global Moderator Joined: Dec 2006 Posts: 20,267 Thanks: 1958 | Quote:
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area, surface, volume |
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