Question

changing dimensions in a rectangular box

suppose that the edge lengths x, y, and z of a closed rectangular box are changing at the following rates:

dx/dt = 1 m/sec, dy/dt = -2 m/sec, dz/dt = 1 m/sec

find the rates at which the box's (a) volume, (b) surface area, and (c) diagonal length s = (x^2 + y^2 + z^2)^(1/2) are changing at the instant when x = 4, y = 3, and z = 2

Answer 1

Okay ima try this.

Answer 2

hey yekim can u go on twiddla? I will post the link here, its easier for me to explain there.

Answer 3

twiddla?

Answer 4

http://www.twiddla.com/494388

Answer 5

its a whitevoard

Answer 6

there's the link u there?

Answer 7

hang on

Answer 8

can someone double check the answers i got:

(a) 2 m/sec
(b) 0 m/sec
(c) 0.06