A cuboid has total surface area of the `40 m^2` and its lateral surface area is `26 m^2` . Find the area of its base.

Explanation

its lateral surface area `=26m^2`

`2h(l+b)=26m^2`

total surface area of cuboid`=40m^2`

`2lb+2(bh+hl)=40`

`2lb+26=40`

`lb=7m^2`

so area of its base`=7m^2`