Question

Three cubes each having an edge 4 cm are joined together. Find the surface area of the cuboid thus formed. Is this surface area equal to the sum of the surface areas of the three separate cubes?


pls answer ​

Answer 1

Answer:

i) 224 cm^2 ii) No

Step-by-step explanation:

3 cubes of edge 4cm are joined end to end, then length of cuboid=4+4+4=12cm

breadth and height=4cm

Surface area=2(lb+bh+lh)

=2(12×4+4×4+12×4)

=2(48+16+48)

=2(112)

=224cm  

Surface area of seperate cubes = (6a^2)3

                                                        6*4*4*3

                                                        288 cm^2

                                                        Hence surface area is not same

Hope it helps!