Question

The sides of a rectangular park are in th
e ratio 4:3.If its area is 1728m,find the cost of fencing it at Rs.2.50 per meter​

Answer 1

Step-by-step explanation:

let the side be x

Area of rectangle=2(L+B)

1728m=2(4x+3x)

1728m=2×7x

1728m=14x

x=1728 ÷14

x=123.42m

fencing=123.42×2.50

fencing=Rs308.55

Answer 2

Answer:

Step-by-st

explanation:length =4x

breadth =3x

area of a rectangle = l*b

so 4x*3x=1728

$12x^{2}$=1728

$x^{2}$=1728/12

$x^{2}$=144

x=12m

fence= perimeter of the park

perimeter of a rectangle = 2[l+b]

l=4x=4*12=48

b=3x=3*12=36

2[48+36]=2*84=168m

1m=2.50 rupees

168m= 2.50*168=420 rupees