# The sides of rectangle are in the ration 4:5 and its perimeter is 180 cm. Find its sides.

40 cm, 50 cm

Let x be the common multiple.

As per question,

Length = 4x

Width = 5x

As per formula,

Perimeter = 2× (l + w)

180 = 2× (4x + 5x)

180 = 18x

x = 10

So,

Length = 40 cm

Width = 50 cm

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