Friday

August 29, 2014

August 29, 2014

Posted by **ssss** on Thursday, October 18, 2007 at 9:18pm.

- calculus -
**bobpursley**, Thursday, October 18, 2007 at 9:44pmThe sides are .707 of the diagonal, and area is s squared, so

Area= .5 diagonal^2

or diagonal= sqrt (2*area)

Perimeter= 4s=4(.707)diagonal

dP/dt= 4*.707 * diagonal/dt

= 4*.707 3in/min

I dont see it vary with the size of the square. check my thinking.

- calculus -
**Reiny**, Thursday, October 18, 2007 at 9:56pmbobpursely is right, the area of 18 in^2 has nothing to do with it.

Here is how I did it

D^2 = 2s^2

D = √2 s

dD/dt = √2 ds/dt

3 = √2 ds/dt ------> ds/dt = 3/√2

P = 4s

dP/dt = 4ds/dt=4(3/√2) = 12/√2 in/min

which is the same as bobpursley's answer

**Related Questions**

calculus - a spherical snowball with diameter 4 inches is removed from the ...

Per Calculus - An apple pie has a 12 inch diameter and the angle of one slice is...

calculus - The side of a square are increasing at 2 inches per second. How fast ...

math - The radius r of a sphere is increasing at the uniform rate of 0.3 inches ...

calculus - A spherical balloon is being inflated at a rate of 10 cubic inches ...

Calculus - A spherical balloon is being inflated at a rate of 10 cubic inches ...

Math-Algebra 1 - I Really Need Help With This Question!! What is the area of the...

Math-Algebra 1 - I Really Need Help With This Question!! What is the area of the...

Calculus - At a certain instant, each edge of a cube is 5 inches long and the ...

calculus - a splenical ballon is being inflated @ 10 cubic inches per secound. ...