All edges of a cube are expanding at a rate of 3 centimeters per second. (a) How fast is the volume changing when each edge is 4 centimeter(s)? (b) How fast is the volume changing when each edge is 9 centimeters?
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Originally Posted by tradar All edges of a cube are expanding at a rate of 3 centimeters per second. (a) How fast is the volume changing when each edge is 4 centimeter(s)? (b) How fast is the volume changing when each edge is 9 centimeters? Let a denote the edge of the cube. Then That means: You already know I've got b) has to be done in just the same way. I leave this part for you.
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