Question

1.
2 cubes each of volume 64 cm are joined end to end. Find the
surface area of the resulting cuboid.​

Answer 1

Answer:

n the figure above two cubes are joined end to end such that a cuboid is formed.Volume of cube = 64 cm3

We know that,

Side of cube =  

=  

= 4 cm

Side of cube = 4 cm

Now these two cubes when joined, we can see from the figure that, their lengths are added and breadth and height remains the same.

Length of new cuboid = 8 cm

Height of new cuboid = 4 cm

Width of new cuboid = 4 cm

We know that:

Surface Area = 2(lb + lh + bh)

Surface Area = 2(8 x 4 + 8 x 4 + 4 x 4)

= 2 x 80

= 160 cm2

Step-by-step explanation: