Question

Three cubes each of side 10cm are joined end to end. Find the surface area of the resultant figure

Answer 1

When three cubes are joined end to end, they form a cuboid of length
$l=10+10+10=30cm$
width
$b=10cm$
and height
$h=10cm$
The total surface area of a cuboid is given by the areas of all it's surfaces
A cuboid has 6 surfaces
The area of the surfaces is given by