The sides of a rectangular Park is in the ratio 4:3 . If it's area is 1728m2 find the cost of fencing it at ₹30per meter
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The area of the rectangular park=l*b
= 4x*3x
= 12x^2
12x^2=1728
x^2 = 1728/12
x^2 = 144
X = √144
X = 12
Therefore it's dimensions are 4*12=48m,3*12=36m
The length to be fenced = perimeter= 2(l+b)
=2(48+36)
= 2(84)
= 168m.
The cost is 30/m
Therefore the cost for fencing= 30*168
= ₹5,040
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