Question

What is the total surface area of a room (cuboidal in shape) of length $12ft$, breadth $10ft$, and height $8ft$?

Answer 1

Total surface area $=2(l\times b+b\times h+h\times l)$
$=2(12\times 10+10\times 8+8\times 12)$
$=2(120+80+96)$
$=2\times 296$
$=592sq.ft$

So the total surface area of the room is $592sq.ft$.