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A piece of string  28m long is to be cut into two pieces, one piece is to be made into a circle and the other
the boundary of a square. How should the string be cut if the sum of the areas of the two figures is to be a minimum


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 Let x metres be made into the circumference of the circle of radius r and the remaining (28-x) metres
into the perimeter of the square of side a
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The combined area will be in terms of r and a. eliminate r and a and express the
combined area in terms of x before starting the minimisation process.
answer and  some steps are given below
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revision problems in some topics for cbse isc mathematics
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