1.

The perimeter of the when both sides increased by 4 cm find the sides of original shape.​

Answer»

ANSWER:

Let the perimeter of original triangle be xcm

If each SIDE of a triangle is increased by 4cm , then ,

The perimeter will be =x+4×3

=(x+12)cm

Now ,

RATIO of perimeter of NEW triangle and given triangle =7:5

x

x+12

=

5

7

On cross MULTIPLICATION , we get,

5(x+12)=7x

5x+60=7x

7x−5x=60

2x=60

x=

2

60

We get ,

x=30

Therefore , the perimeter of the given triangle is 30cm

I hope help this answer.


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