Question

answer the question​

Answer 1

Answer:

Let the ratio be x

3x + 5x +4x =900

12x = 900

900/12 = x

75 =x

a = 3x = 3*75 = 225

b = 5x = 5*75 = 375

C = 4x = 4*75 = 300

By herons formula

S = a+b+c/2

= 225 + 375 + 300/2

= 450

Area = s(s-a) (s-b) (s-c)sqrt

= sqrt (450 * 225 * 75 * 150)

= 33750m^2

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Answer 2

Answer:

Let the sides of the triangle be 3x,5x,4x

3x+5x+4x=900

12x=900

$x = \frac{900}{12}$

x=75

The sides are

3x=3×75=225m

5x=5×75=375m

4x=4×75=300m

The sides of the triangle are 225m,375m and 300m

By herons formula

S = a+b+c/2

= 225 + 375 + 300/2

= 450

Area = s(s-a) (s-b) (s-c)sqrt

= sqrt (450 ×225 × 75 × 150)

= 33750m²