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 Post subject: DerivationPosted: Sun, 10 Apr 2011 22:34:21 UTC

Joined: Wed, 6 Apr 2011 11:26:16 UTC
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A conical tank has base radius of 25mm and the height 50mm. It is filled with water till 40mm.

How much does the volume of the water increase if the level is raised by 2mm.

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 Post subject: Re: DerivationPosted: Sun, 10 Apr 2011 22:38:19 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
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Location: Austin, TX
yusufgovani wrote:
A conical tank has base radius of 25mm and the height 50mm. It is filled with water till 40mm.

How much does the volume of the water increase if the level is raised by 2mm.

the change is the final minus the initial. Use that the volume of a cylinder is where h is the height.

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 Post subject: Re: DerivationPosted: Sun, 10 Apr 2011 22:48:17 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
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yusufgovani wrote:
A conical tank has base radius of 25mm and the height 50mm. It is filled with water till 40mm.

How much does the volume of the water increase if the level is raised by 2mm.

the change is the final minus the initial. Use that the volume of a cylinder is where h is the height.

The volume of a cone is given by ...

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 Post subject: Re: DerivationPosted: Sun, 10 Apr 2011 22:50:13 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
outermeasure wrote:
yusufgovani wrote:
A conical tank has base radius of 25mm and the height 50mm. It is filled with water till 40mm.

How much does the volume of the water increase if the level is raised by 2mm.

the change is the final minus the initial. Use that the volume of a cylinder is where h is the height.

The volume of a cone is given by ...

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 Post subject: The conical tankPosted: Mon, 11 Apr 2011 12:38:44 UTC

Joined: Wed, 6 Apr 2011 11:26:16 UTC
Posts: 8
Thank you for help. I worked out the final volume minus the intial volume but I do not get the answer which is 2.5ml.

I used the formula for volume of cone 1/3 r^2 pi h. I do not unerstand where i have gone wrong.

Any tips.

Thank you

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 Post subject: Re: The conical tankPosted: Mon, 11 Apr 2011 13:16:58 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
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Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
yusufgovani wrote:
Thank you for help. I worked out the final volume minus the intial volume but I do not get the answer which is 2.5ml.

I used the formula for volume of cone 1/3 r^2 pi h. I do not unerstand where i have gone wrong.

Any tips.

Thank you

How can we pinpoint where you have gone wrong if we haven't seen what you actually did nor what answer you got?

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 Post subject: Re: The conical tankPosted: Mon, 11 Apr 2011 14:56:50 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
yusufgovani wrote:
Thank you for help. I worked out the final volume minus the intial volume but I do not get the answer which is 2.5ml.

I used the formula for volume of cone 1/3 r^2 pi h. I do not unerstand where i have gone wrong.

Any tips.

Thank you

I agree with outermeasure. Also, your eventual answer will have a in it.

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 Post subject: conical tankPosted: Thu, 14 Apr 2011 12:42:11 UTC

Joined: Wed, 6 Apr 2011 11:26:16 UTC
Posts: 8
I used : (pi/3*2.1*2.1*4.2)- (pi/3*2.0*2.0*4.0)=2.6

42/50*2.5= 2.1 FINAL

Is this correct method?

Thanks

Yusuf

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 Post subject: Re: conical tankPosted: Thu, 14 Apr 2011 13:20:25 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
yusufgovani wrote:
I used : (pi/3*2.1*2.1*4.2)- (pi/3*2.0*2.0*4.0)=2.6

42/50*2.5= 2.1 FINAL

Is this correct method?

Thanks

Yusuf

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 Post subject: Posted: Thu, 14 Apr 2011 14:34:17 UTC

Joined: Wed, 6 Apr 2011 11:26:16 UTC
Posts: 8
Thank you

Yusuf

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