The sides of rectangle are in ratio 4 ∶ 3.If its area is 1728m' Find the cost of fencing at Rs. 30 per m2 [Rs. 5040]
The sides of rectangle are in ratio 4 ∶ 3.If its area is 1728m' Find the cost of fencing at Rs. 30 per m2 [Rs. 5040]
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Given area= 1728m^2
Area of rect. = l*b
1728 = 4x*3x
1728=12x^2
1728/12= x^2
144 = x^2
12 = x
So lenght =4x =4*12 =48m
Breadth =3x =3*12 = 36m
Cost of fencing = ₹30/m
Perimeter of rect = 2(l + b)
=2(48+36)
=2*84
=168m
Cost of fencing = ₹( 30*168)
=₹5040