Question

Three cubes each of side 15cm are joined end to end . Find the total surface area of the resulting solid??

Answer 1

if three cubes are joined together it will form a cuboid
length of the cuboid =(15+15+15)cm
=45cm
breadth of the cuboid =15 cm
height of the cuboid =15 cm
now,
TSA OF CUBOID =2(lb+bh+hl)

$2(45 \times15 + 15 \times 15 + 15 \times 45)$
$= 3150 \: cm {}^{2}$

Answer 2

The answer is 3150cm^2
Check pic plz