The length of a rectangular park is 20 m more than its breadth. If the cost of fencing the park at ₹53 per metre is ₹21200, then what is the area (in m$$^2$$) of the park ?
the cost of fencing the park at ₹53 per metre is ₹21200
therefore perimeter = 21200/53 = 400
Length= 20 + x ,breadth = x
By the problem,
$$2*(20 + x + x)$$ = 400,
20 + 2x = 200
2x = 180
x = 90
Length = 110
Hence Area 110 *90= 9900
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