Christmas napkins

Girls embroidered Christmas napkins. Each napkin was triangular with sides of 5 dm, 60 cm, and 800 mm. What was the total length of stitching in centimetres if they made 15 napkins?

Final Answer:

x =  2850 cm

Step-by-step explanation:

a=5 dm cm=5 10  cm=50 cm b=60 cm c=800 mm cm=800:10  cm=80 cm  o=a+b+c=50+60+80=190 cm  x=15 o=15 190=2850 cm

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planimetryUnits of physical quantitiesGrade of the word problem

 
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