Answer:
40 cm.
Explanation:
If 2 cups is 16 cm, and 4 cups are 20cm. You can multiply 4 by 2 to get 8. (20 x 2 = 40cm)
(16 divided by 2 = 8). ( 8 = the total length of each cup)
So...
( 8 cups are = to 40 cm)
Hope this helps
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