Question

each side of a triangle is increased by 10 cm. If the ratio of the perimeters of the new triangle and given triangle are 5:4, find the perimeter of the given triangle.

Answer 1

Answer:

The perimeter of given triangle is 120cm.

Step-by-step explanation:

Let the perimeter be x.

A triangle has 3 sides. Each side is increase by 10 cm . So total increase in perimeter=

10cm×3= 30cm.

Now, perimeter is 30+x.

According to question;

Ratio of the perimeter of new triangle and given triangle are 5:4

$\frac{30 + x}{x} = \frac{5}{4} \\ \\ 4(30 + x) = 5x \\ 120 + 4x = 5x \\ 120 = 5x - 4x \\ 120 = x \\ x = 120cm$

Answer 2

Answer:

Step-by-step explanation: