Question

Total surface area of a cuboid whose length, breadth and height is 5 cm, 4 cm and 3 cm, respectively, is .

• A. $86{\text{cm}}^2$
• B. $94{\text{cm}}^2$
• C. $51{\text{cm}}^2$
• D. $64{\text{cm}}^2$

Answer 1

The correct option is B $94{\text{cm}}^2$

Given: Length of the cuboid, l = 5 cm
Breadth of the cuboid, b = 4 cm
Height of the cuboid, h = 3 cm

Total surface area of the cuboid
$=2(lb+bh+hl)=2\left[\right(5\times 4)+(4\times 3)+(3\times 5\left)\right]=2[20+12+15]=2\left(47\right)=94{\text{cm}}^2$
$\therefore$ Total surface area of the cuboid is 94 cm${}^2$