3. The sides of a triangle are in the ratio 5:7: 8. If the perimeter of the triangle 100 cm, find
the length of the sides of the triangle
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Answer:let the ratio be 5x;7xand8x and the perimeter of triangle given120degree then 5x+7x+8x =100
20x=100
X=100\20=5 then 5x=5×5=25;7x=7×5 =35;8x=8×5=40. Thanks
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