Calculate 6144

Calculate in dm2 the surface of a quad whose edges have 1.2 dm, 1.4 dm, and 2dm.

Correct answer:

S =  13.76 dm2

Step-by-step explanation:

a=1.2 dm b=1.4 dm c=2 dm  S=2 (a b+b c+a c)=2 (1.2 1.4+1.4 2+1.2 2)=13.76 dm2



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