The answer is Net A with a surface area of 390 square inches
solving
we get value of n: 
Step-by-step explanation:
Solving the expression:

Solving:

So, solving
we get value of n: 
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355÷5=
__71________
5(355
35 l
0 5
5
0
Not sure but I think she has 1 31/35 yards of ribbon.