Question

Each side of a triangle is increased by 10 cm. If the perimeters of the new triangle and the given triangle is 5:4,Find the perimeter of the given triangle.

Answer 1

one side of the first triangle be x,so three sides be 5*3*x=15x
one side of the second triangle be 12x
15x-12x=30
x=10
15x=150
12x=120