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The sides of a rectangle are in the ratio 5 : 4 and its perimeter is 90 cm. Find its length and breadth.

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Best answer

Let x be the common multiple. 

Length = 5x 

Breadth = 4x 

Perimeter = \(2(l+w)\)

90 = 2 (5x + 4x)

18x = 90 X = 5 

Length = 5x = 25 cm 

Breadth = 4x = 20 cm

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