Question 1196390: A rectangular field whose area is
11200 square feet is to be divided into two parts as shown. Fencing must be used to enclose the field, as well as for the internal partitions
By how much did the total amount of fencing change as the width went from
200 feet to 400 (round your answer to three decimal places)
What was the average rate of change over this interval?
(round your answer to three decimal places)
https://gyazo.com/cce10c468fe529ad86865c9e8ae1dbf3 <- picture of problem
Answer by ikleyn(52803)   (Show Source):
You can put this solution on YOUR website! .
Problem does not say that the area remains the same.
THEREFORE, by default, I will assume/interpret that the length is not changed.
Part (a) is very simple.
When the width increased from 200 ft to 400 ft, three dimensions increased from 200 to 400 ft (see the referred plot).
Therefore, the total increase of the whole fence, including the internal partition is 3*200 = 600 ft. ANSWER
Part/question (b) makes no sense and can not be answered,
because the concept " rate " assumes that time interval is given in the problem, which is not the case.
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