Question

the sides of a rectangular park are in the ratio 4:3. if its atea is 1728 metre square, find the cost of fencing it at rs. 30 per metre.​

Answer 1

Step-by-step explanation:

Let the sides of the park be 4x and 3x

Area of the park = 1728

lenght × breadth = 1728

4x × 3x = 1728

12xsq = 1728

xsq = 1728/12

x = root 144

x = 12

therefore

lenght and breadth = 2×2×3 = 12

hence,

lenght = 4×12=48

breadth = 3×12=36

perimeter = 2(48+36)

= 2×84= 168 m

cost of fencing = rs(168×30)

=rs5040

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Answer 2

Answer:

Step-by-step explanation:

Let the length and width of rectangular park be 4x and 3x respectively.

= 4x×3x=1728

=12x=1728

1728÷12=X

X=144

Length=4×144=576

Width=3×144=432

Perimeter=2(l+b)

2(576+432)=2,016m

Cost of fencing 1 meter=30 Rs

Cost of fencing 2,016 meters= 2016×30=60480 Rs