Mr. Brown bought tickets for two adults and four children. She paid with a $50 bill. How much change did she receive?
1 answer:
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Given:
All the edges of a cube are expanding at a rate of 4 in. per second.
To find:
The rate of change in volume when each edge is 10 in. long.
Solution:
Let a be the edge of the cube.
According to the question, we get
We know that, volume of a cube is
Differentiate with respect to t.
Putting the given values, we get
Therefore, the rate of change in volume 1200 cubic inches per second.