A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/

Mathematics
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A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. (a) 1 sec

(b) 3 sec

(c) 6 sec

Jun 13th, 2015

Thank you for the opportunity to help you with your question!

rate is speed/time

a) 40cm/s/1s

which is 40m/s power of  2

b)13.33m/s power of 2

c)6.67m/s power of 2

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 13th, 2015

pleasure to work with you


Jun 13th, 2015

I typed those answers into my online homework program, which tells you if the answers are right or wrong, and it says all of those are wrong, but it doesn't tell me why. 

Jun 13th, 2015

Then there might be something wrong in the system,meanwhile let me confirm somewhere.


Jun 13th, 2015

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