How many cubic centimeters of silver are needed to cover just the faces of a cube with a layer of silver that is 1 mm thick if the cube has edges of length 6 cm? Express your answer to the nearest whole number.
+23254 Each side is a square of the area of one side is 6 cm x 6 cm = 36 cm2.
There are 6 sides, so the total surface are is 6 x 36 cm2 = 216 cm2.
1 mm = 0.1 cm.
To find the volume, multiply the total area by the thickness: 216 cm2 x 0.1 cm = 21.6 cm3.
(This won't include any amount that is needed for "wrap-around".)
