What is the maximum total area that 450cm of string can enclose if it is used to form the perimeters of two adjoining rectangles
1 answer:
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Answer:
Option A.
Step-by-step explanation:
Area of a square is
.... (1)
where, x is side length.
The length of each side of his square plot is decreasing at the constant rate of 2 feet/year.
It is given that bob currently owns 250,000 square feet of land.
Fist find the length of each side.
Taking square root on both sides.
Differentiate with respect to t.
Substitute x=500 and in the above equation.
Farmer bob is losing 2,000 square feet of land per year.
Therefore, the correct option is A.