Answer:
2598m²
Step-by-step explanation:
<em>Figure</em><em> </em><em>:</em><em> </em>

Here we are given that the ratio of sides of a triangular plot is 3:5:7 and its perimeter is 300m . We are interested in finding the area of the rectangle . Firstly , let us take the given ratio's HCF be x , then we may write the ratio as ,
<em>According</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>question</em><em> </em><em>,</em>
Therefore , the sides will be ,
Now we may use Heron's Formula to find out the area of triangle as ,
<em>Heron's</em><em> </em><em>Formula</em><em> </em><em>:</em><em>-</em>
- If three sides of a ∆ is a , b , c then the area is given by
, where s is the semi perimeter .
Here ,
Therefore ,

And we are done !