150 x 150 mm is a 2-dimensional figure. A cube is a 3-dimensional object and so you cannot have a 150x150 mm cube.
Furthermore, cubes with sides of 150 mm are rarely used. I have not used one ever - and I am over 60!
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The surface area of a cube with a volume of 512 mm3 is: 384 square mm
The surface area of cube M is 6(10 mm)2 = 6(100 mm2) = 600 mm2 The surface area of cube N would be 6(20 mm)2 = 6(400 mm2) = 2,400 mm2
15*15*15 = 3375 cubic mm = 0.003375 litres
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1mm cube has volume of 1mm3 and a surface area of 6*(1*1) = 6mm²2mm cube has a volume of 8mm3 and a surface area of 6(2*2)=24mm²Ratio for 1mm cube is 6-1 and ratio for 2mm cube is 3-1 ■