Question

Please solve this question

Answer 1

let multiplier of ratios is x.then its sides are 13x,12x,15x.its perimeter=12x+13x+15x=450
40x=450
x=45/4
now use the heroin method by calculating s=40x/2=20x =20(45/4)=225
use formula area=
$= \sqrt{s(s - a)(s - b)(s -c) }$