Question

the side rectangular Pak are in the ratio 4:3 if the area is 1728 metre square find the cost of fencing it rate of Rs point 2. 50/m ​

Answer 1

let the side of rectangle be 4x and 3x

area of rectangle field = l×b

1728=4x×3x

1728=12x

x^2=1728/12=144=12

so l=3×12=36m and b=4×12=48m

perimeter of rectangle=2(36+48)

=2×84=168m

cost of fencing per meter=168×2.50

rupee 420