Question

A cuboid has total surface area of 40 m² and lateral surface area of 26 m². Find the area of it base.

Answer 1

Surface area of top and bottom face of cuboid = Total surface area of cuboid $-$ lateral surface area of cuboid
= 40$-$26 = 14 m²
We know that the area of top and bottom face of a cuboid are equal.
So, area of base = $\frac{14}{2}=7{\mathrm{m}}^2$