Question

the volume of each cube is 342cm(cube). when three such cubes are join together to form a new solid find the T.S.A of new solid
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Answer 1

Answer:

ANSWER

Let the side of each cube be a. Then a3=216

∴a=3216=6cm

Now the two cubes of side 6 cm are joined to form a cuboid. So,

∴l=6+6=12cm,b=6cm,h=6cm

∴T.S.A=2(lb+bh+lh)

=2[(12×6)+(6×6)+(12×6)]

=2[72+36+72]

=2×180=360cm2