1600
For a cuboid it gives its volume.
I think you are asking how do you calculate the VOLUME of a disk 250mm with a thickness of 20 mm. If that is so, then find the area of the circle using the Area = pi times radius squared formula and then multiply by the thickness to get cubic millimeters volume.
the volume increase 8 times
It equals volume that is calculated in cubic units.
Its volume is 200 cm3 for every centimeter of thickness.(You haven't mentioned what the book's thickness is.)
it is the volume
A surface area and a volume are qualitatively different. If for some body the surface area and the volume are numerically equal in one unit of measurement, then in another unit of measurement they won't be the same. For example, a cube of 6 m x 6 m x 6 m cube has a a volume of 216 cubic meters, and an area of 216 square meters, but if you calculate volume and surface area in cubic centimeters, the volume is a number that is 100 times greater.
volume The 'Volume' of an object or space
1600
The volume of a hemisphere is equal to two thirds times pi times the radius cubed.
Volume is 4/3 pi*radius*radius*radius 3.14 times 7 times 7 times 7 times 4 divided by 3= volume 1436.2666666 Surface area is 4 * pi * radius * radius 4 times 3.14 times 7 times 7=surface area 615.44
volume is equal to four thirds pie times the radius cubed.
For a cuboid it gives its volume.
The crystals. One way to think of this is the following. The cube has a certain surface area - the outside. If you cut it in half with a knife, you add additional surface area, at the cut. Any additional cut will continue increasing the surface area. In general, small objects have a larger surface/volume ratio than large objects, other things being equal (which in this case means, their shape is the same). An object that is 10 times larger than another (geometrically similar) object has 10 times more surface/volume ratio.
I think you are asking how do you calculate the VOLUME of a disk 250mm with a thickness of 20 mm. If that is so, then find the area of the circle using the Area = pi times radius squared formula and then multiply by the thickness to get cubic millimeters volume.
Volume