Answer:
600 millimeters.
Explanation:
55+20=75
75-15=60
Since there are 10 millimeters in 1 centimeter so I multiplied 60 x 10 = 600
55 +20 = 75
then she cuts 15
75-15 = 60
60 cm in milimiters
50*10
600 milimeters is the answer
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