Question

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 ratio 4 find the perimeter of the given Triangle

Answer 1

answer will be 120 you can make perimeter and by adding 10 cm each it will be 30+x where x is perimeter of triangle

Answer 2

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Suppose the original perimeter be k .

Now, Increasing each side by 10 means we increase the perimeter by 30.

Therefore, New perimeter = k + 30 .

Given, Ratio = 5 : 4 .

( k + 30 ) / k = 5 / 4

⇒ 4 k + 120 = 5 k

⇒ 120 = 5 k - 4 k

⇒ k = 120

Therefore, the required perimeter is 120 cm .