The sides of the triangle are in the ratio 4:5:6 and then the perimeter of the triangle is 90m. then Area of the triangle.
Since the ratio of sides is given as 4:5:6, let the side of the triangle be 4y,5y and 6y.
The perimeter is given as 90.Thus,
90=4y + 5y + 6y=15y
=> y=6.
Thus, the sides are 24,30,36.
Area of the triangle by Heron's formula=√s(s-a)(s-b)(s-c)=357.14 , where s is the semiperimeter and a,b,c are the sides of the triangle.
Since no options satisfy the answer, option D none of these is correct.
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