The sides of rectangular park are in the ratio 4:3 if the area is 1728msquare find the cost of fencing it at the rate of rs 2.50/m
Area of a rectangle=l×b
1728=3x×4x
1728=12xsqare
12xsqare=1728
Xsqare=1728/12
Xsqare=144
X=squareroot of 144
X=12
Perimeter of rectangle=2(l+b)
=2(3x+4x)
=2(7x)
=14x12
=68
Perimeter=168
Cost of fencing=168×2.50
420.0