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Hey there! Here's the answer
So, we are given the ratio of the rectangular park. Hence let the parts be 4x and 3x.
The area given is 1728 m2.
We also know that the area of a rectangular is equal to l x b
Hence let us substitute the formula with the known values.
4 x * 3x = 1728.
12x^2 = 1728.
x^2 = 1728 / 12
x^2 = 144.
We also know that 12 times 12 is 144.
Hence the value of X is 12 cm.
Now substitute the values of it's length and breath.
It's length is 48 cm. And it's breath is 36. (Just multiply 12 by 4 and 3. Refer to 4x and 3x mentioned above).
Now we calculate the perimeter.
Perimeter of the field = 2(l+b)
= 2( 48 + 36)
= 2 (84) = 168 m.
Total cost of fencing at the rate of 40 rupees per meter is = 168 x 40
= 6720 rupees is the total amount.
Hope this helps you! I really hope that I've provided the necessary explanation for better understanding !
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