Question

Surface area of a cuboid is given by $A=2(lb+bh+hl).$
If $l=16\text{cm,}b=5\text{cm}$ and $h=2\text{cm},$ then its surface area is ___.

• A. $122c{m}^2$
• B. $222c{m}^2$
• C. $224c{m}^2$
• D. $244c{m}^2$

Answer 1

The correct option is D $244c{m}^2$

Given $l=16\text{cm,}b=5\text{cm}$ and $h=2\text{cm}.$
$A=2(lb+bh+hl)$
Substituting the value of $l,b$ and $h$ in the above equation, we get,
$A=2(16\times 5+5\times 2+16\times 2)$
$=2(80+10+32)$
$=244c{m}^2$