Calculate 6244

Calculate how many dm² of sheet metal it takes to produce a box without a lid measuring 2.1dm, 3.5dm, and 0.5dm in height.

Correct answer:

S =  12.95 dm2

Step-by-step explanation:

a=2.1 dm b=3.5 cm c=0.5 dm  o=2 (a+b)=2 (2.1+3.5)=556=11.2  S=a b+o c=2.1 3.5+11.2 0.5=12.95 dm2

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