# CBSE Class 8 Answered

**The perimeter of a triangle is 60cm and its sides are in the ratio 3:4:5. What are in the ratio 3:4:5. What are the length of the sides?**

Asked by Nimmi | 23 Jan, 2019, 11:13: PM

Expert Answer

Let the common multiple of the given ratios be 'x'

Thus the ratio will now become 3x, 4x and 5 x.

Perimeter of a triangle is sum of all the sides of a triangle.

Summing up the ratios of the sides we get,

3x + 4x+ 5x = 60

12x = 60

x = 60/12

x= 5

Thus side with the ratio 3x measures, 15 cm,

Side with the ratio 4x measures, 20 cm and

Side with the ratio 5x measures, 25 cm.

Answered by Science Mate | 24 Jan, 2019, 01:53: AM

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