Answer :

Width=Area/Length

Area=9/20(.45)

Length=9/10(.9)

w=.45/.9

w=1/2


Therefore, the width is 1/2(.5)

9/20 = w x (9/10)
w = (9/20) / (9/10)
w = (9/20) x (10/9) = 1/2

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