Tuesday

September 30, 2014

September 30, 2014

Posted by **kelli** on Saturday, December 19, 2009 at 11:19am.

AP Calculus related rates problem?

The volume V or a cone (V = 1/3 ð r² h) is increasing at a rate of 28ð cubic units per second. At the instant when the radius r of the cone is 3 units, its volume is 12ð cubic units and the radius is increasing at 0.5 unit per second.

c)At the instant when the radius of the cone is 3 units, what is the instantaneous rate of change of the area of its base with respect to its height h?

my teacher showed my how to get the answer but i dont understand why..can someone show the steps with explanation PLEASE?

..by the way the answer is 3pi/8

- math -
**Kevin**, Monday, January 11, 2010 at 9:50pmOk really I don't know all of the steps but if you look at the da/dt of a) and put it over the dh/dt of b) then you get your answer. I don't know. I'm doing it right now.

God Bless!

**Answer this Question**

**Related Questions**

related rates problem-calculus - A spherical balloon is being filled with air in...

Calculus - Let V be the volume of a right circular cone having height h and ...

calc-related rates - "The volume of a cone of radius r and height h is given by ...

calculus: related rates - hello, please help me. A cylindrical can is being ...

calculus (related rates) - A particle moves in the plane along the curve y=xln(x...

calculus - Suppose that the radius r of a right circular cone of fixed height h...

Math - Calculus - Im trying to understand related rates here and im getting ...

related rates calculus problem - A balloon is being filled with air at a rate of...

Calculus AB - The volume V or a cone (V = 1/3 π r² h) is increasing at a ...

calculus help please - At the instant when the radius of a cone is 3 inches, the...