Question

Q3 Each side of a triangle is increased by 10 cm; if the ratio of the perimeter of the new
triangle and the given triangle is 5:4, find the perimeter of the given triangle​

Answer 1

Answer:

120

Step-by-step explanation:

Let each side be x

perimeter of the triangle= 3x

New perimeter= 3x+30

therefore,

3x+30:3x=5:4

(3x+30)/3x=5/4

4(3x+30)=3x(5)

12x+120=15x

120=15x-12x

=3x

120/3=x

40=x

perimeter of given tringle=3x

3(40)

=120cm

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