Question

Find the perimeter of triangle if one side is 11 centimeters another side IS 1/5 the perimeter and the third side is 1/4 the perimeter

Answer 1

Let the perimeter be x.
1st side = 11cm
2nd side = x/5cm
3rd side = x/4

Hence
x/5+x/4+11=x
x-x/4-x/5= 11
(20 - 5 - 4)x = 11*20
11x=11*20
x = 20

Therefore the perimeter is 20 cm.

Answer 2

let perimeter be x
then perimeter = s+s+s
11+1/5x+1/4x=x