Sunday

April 20, 2014

April 20, 2014

Posted by **help** on Monday, February 20, 2012 at 10:24pm.

I got 3/pie, is that correct?

- Calculus -
**Reiny**, Monday, February 20, 2012 at 11:09pmI got 4/π

let the radius be r, then the height is 2r

V= (1/3)πr^2 h

= (1/3)πr^2(2r)

= (2/3)πr^3

dV/dt = 2π r^2 dr/dt

when 2r=.5

r = .25 and dV/dt = .25

1/4 = 2π(1/16) dr/dt

times 8

2 = π dr/dt

dr/dt = 2/π

d(2r)/dt = d(height)/dt = 4/π

- Calculus -
**help**, Tuesday, February 21, 2012 at 2:02amThank you!

**Related Questions**

CALCULUS - Sand is being poured from a converyer belt forming a conical pile ...

maths-surface area - A cone 7dm high and 6 dm in diameter is placed on the ...

engineering - A cylinder has 500 cm^3 of water. after a mass of 100 grams of ...

math - container A has twice the capicity of container B. container A is full of...

math - container A has twice the capicity of container B. container A is full of...

math - container A has twice the capicity of container B. container A is full of...

math - container A has twice the capacity of container B. Container A is full ...

Physical Science - Pour vinegar onto beach sand in the Carribian and the results...

math word problems - Container A has twice the capacity of container B. ...

calculus - please help if you can At a sand & gravel plant, sand is falling off ...