Question

If one side of triangle is 1/4 of its perimeter, other side is 7cm and third side is 2/5 of its perimeter, then find the perimeter of the triangle

Answer 1

Answer of the triangle's perimeter is 20 c.m.

Answer 2

Answer:

the answer is 20cm

Step-by-step explanation:

Let the 3 sides of a triangle be a,b,c and Perimeter be P

Then, according to the question

a = P/4 ; b = 7cm ; c = (2P)/5

We know P=a+b+c

⇒ P = P/4+7+2P/5

⇒140+13P=20P

⇒140=7P

⇒P=20cm