If the height of a cube doubles and becomes a square prism instead of a cube, four of the six original equal area surfaces double in area, but the other two are unchanged. Therefore the area of the square prism is (2/3) X 2 = 4/3 as great as the original cube.
If the original object is to remain a cube when its height doubles, all the other dimensions must also double; in that instance, the area increases by a factor of four.
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The base areas quadruple and the curved surface doubles.
The area doubles if the base stays the same.
The surface area is reduced by a factor 4, the volume by a factor 8.
The height of a cylinder with a radius of 8 and a surface area of 954.56 is 10.99
A cylinder with a surface area of 200cm2 and a height of 20cm has a volume of about 137.96cm3