Question

Poonam is folding together an open-topped cardboard box using this net. What is the surface area of the outside of the box?

• A. $47m^2$
• B. $54m^2$
• C. $73.5m^2$
• D. $90.5m^2$

Answer 1

The correct option is C $73.5m^2$

Height $=4$ m

Length $=4.5$ m

Breadth $=3$ m

Surface area of given cuboid $=$ Total Surface Area $-$ Area of top

$=2(3\times 4+4\times 4.5+4.5\times 3)-4.5\times 3$

$=73.5$ m${}^2$