Question

The three sides of triangle park are in the ratio 4:3.if its area is 1728 m square ,find the cost of fencing it at ₹30 per metre.

Answer 1

Answer:

We can find length and breadth in this way

Let length=4x

breadth=3x

Ratio =4:3

Area= l x b = 1728 m square

4x x 3x = 1728 m square

12x square=1728 m square

x square=1728/2=864

x= root 144

x=12

so length=4x12=48m

breadth=3x12=36m

Step-by-step explanation:

Answer 2

Hey there!!!

Let 4x and 3x be the dimension of the rectangular park

According to the question -

$= > 4x \times 3x \: = 1728 \\ = > {12} {x} ^{2} = 1728 \: {m}^{2} \\ = > {x}^{2} = 144 \\ = > x \: = \sqrt{144} \\ = > x = 12$

L = 4x => 4 ×12 = 48

B = 3x => 3 × 12 = 36

Perimeter = 2( l+ b)

= 2 ( 48+36)

= 168

cost = rate × perimeter

= 30 × 168

= ₹ 5040

Hope this helps u !!!