Respuesta :

Your answer would be 60 cm

Perimeter is when you add all sides together.

Length = 10 cm
Width = 20 cm

There are 4 sides and 2 of each has the same measurements.

So:

L = 10 x 2 = 20

W = 20 x 2 = 40

Add them.

40 + 20 = 60


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