Question

three cubes of side 4cm are joined together side by side to have cuboid . Find surface area and volume of a cuboid.​

Answer 1

Step-by-step explanation:

When such three cube are joined end to end then length(l) of resulting cuboid =12cm

or width (b) of resulting cuboid =4cm

and height (h) of resulting cuboid =4cm

surface area of resulting cuboid =2(lb+bh+hl)

=2(12×4+4×4+4×12)

=2(48+16+48)

=2(96+16)

=2(112)=224cm

2

Surface area of cube =6l

2

=6×(4)

2

=256cm

2

Ratio =

area of cube

area of cuboid

=

256

224

=

64

56

=

8

7

Answer 2

Step-by-step explanation:

2( lb +bh+hl)

2(4*4+4*12+12*4)

2(16+48+48)

2(64+48)

2(112)

224 cm ^3