Question

find the side of a cube when its total surface area is 486 CM square

Answer 1

=Surface area = 6a×a
= 486. = 6 ×a×a
= 486/6 = a×a
= 81. = a× a
=. √81. = a
=. 9. = a
so , side of cube is 9 cm
.
'''hope it helps uh'''

Answer 2

486=6a×a
a=9
$486 =6 a \times a \\ a \times a = 486 \div 6 \\ a = 9$