its an 8th standard question . but i m unable to solve it. please help Question " the perimeter of a triangle is 84m . the sides are in the ration 13:14:15 . find the area . "
(answer should come this === area = 336 square meter)
what i had tried is this.
s = (13+14+15)/2 = 21 Area = SquareRoot(21(21-13)*(21-14)*(21-15)) Area = 84 not correct dont know where i am wrong