Question

The sides of a triangle are in the ratio3:4:5 and its perimeter is 84 cm. Findthe lengths of its sides.

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Answer 1

Answer:

Let the sides be in ratio 3x:4x:5x

According to question

Perimeter = 3x + 4x + 5x

84 = 12x

Thus x = 7

implies 3x = 21, 4x = 28, 5x = 35

Therefore the length of the sides are 21,28 and 35.

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Answer 2

Answer:

let the lengt of the sides be 3x,4x and 5x...

given,the perimeter is 84cm

therefore,

3x+4x+5x= 84

=>12x=84

=>x=7

therefore the lenght of the sides are 21cm,28cm and 35cm