if the surface area of a cube is 486 cm sq, find its volume?
surface area of cube = 6 X (s)2
where "s" is the side of the cube.
therefore,
6s2 = 486
hence, s2 = 81
=> s = 9 cm
therefore volume = (s)3 {as all the dimensions have same length}
= (9)3
= 729 cm3
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