Question

The side of a rectangle are in the ratio. 9:4 if its perimeter is 130 cm find its sides

Answer 1

$let \: the \: length \: of \: rectangle \: = 9x \\ so \: \: breadth \: of \: rectangle = 4x \\ \\ perimeter \: of \: rectangle = 130 \: cm \\ = > 2( l+ b) = 130 \\ = > 2(9x + 4x) = 130 \\ = > 2 \times 13x = 130 \\ = > 26x = 130 \\ \\ = > x = \frac{130}{26} \\ \\ = > x = 5 \\ \\ therefore \: \: length \: of \: rectangle = 9 \times 5 \\ = 45cm \\ \\ breadth \: of \: rectangle = 4 \times 5 = 20cm \\ \\ \\ please \: mark \: it \: as \: brainliest...$


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Answer 2

Answer:

20 & 45 cm

Step-by-step explanation:

Ratio of the sides=9: 4

Let the sides be 9x and 4x

Perimeter=130cm

Perimeter=2(l+b)  

130=2(9x+4x)  

130/2=13x

65=13x

x=65/13

x=5

sides are 9x & 4x

9x = 9*5 = 45 cm

4x = 4*5 = 20 cm