Question

the sides of triangle are in the ratio 3:5:7 and its perimeter
is 450m.find its area​

Answer 1

Answer:

30m

Explanation:

let the common multiple of the ratio be X

therefore, perimeter of the triangle is

3x+5x+7x=450

15x=450

x=450÷15

therefore,X=30 m

Answer 2

Explanation:

let side of triangle is= x

first side be 3x

second side be 5x

third side be 7x

perimeter is 450m

perimeter of triangle = sum of all sides

450= 3x + 5x + 7x

450= 15x

therefore, X = 30

so

first side is 3 * 30 = 90

second side is 5*30 = 150

third side is 7*30= 210

let's check

90+150+210=450

hope it will help you