Question

In a triangle, the longest side is double the shortest side and the third side is 3 cm less than the longest side. If the perimeter of the triangle is 27 cm, find all the sides of the triangle.

Answer 1

let first side be x
longest side=2x
third side=2x-3

perimeter=2x+x+2x-3
27=5x-3
30=5x
x=6

first side=6
second side=12
third side=9