Cube-shaped 28101

How many square decimetres of sheet metal are needed for a cube-shaped tank, open at the top with an edge of 75 cm?

Correct answer:

S =  281.25 dm2

Step-by-step explanation:

a=75 cm dm=75:10  dm=7.5 dm  S=5 a2=5 7.52=281.25 dm2



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