Question

two cubes,each 12cm edge are joined end to end find the surface area of reasulting area

Answer 1

surface area of cube is 6 a^2
because its joined so its surface area will
$5{a }^{2}$
because one side is hidden.
we have given edge is 12 cm.
hence
surface if first cube + surface of second cube

=5 x 12^2 + 5x 12^2
=5 x 144 + 5 x 144
= 1440 cm square