Question

Three cubes are placed adjacent to each other in
a row. Find the ratio of the total surface area of the
cuboid so formed and that of any one of these
cubes.
[CBSE 2012]​

Answer 1

Answer:

7:9

Your answer is attached above

Answer 2

Answer:

14a²

Step-by-step explanation:

side of Cube =a

For cuboid

Length =3a

breath =a

Height=a

Total surface area =2(3a×a+a×a+a×3a)= 14a²