A cuboid is cut into two identical cubes, increasing the surface area by 18 cm2, which is () cm2

A cuboid is cut into two identical cubes, increasing the surface area by 18 cm2, which is () cm2

After cutting into cubes,2 faces of the cube are added, each with an area of 18÷2=9 cm2
The original cuboid corresponds to the face of 10 cuboids
Surface area is;9×10=90 cm2

A cuboid is 16 meters long and 6 meters high and is cut horizontally into two cubes, increasing the surface area by 160 square meters

Is cut into two square, that surface area is increased by two bottom surfaces,
So 1 bottom =160÷2=80 m2
So width=80÷16=5m
Original cuboid surface area =(16×5+16×6+5×6)×2=412 square meters