Question

2. Two cubes each of edge 12 cm are
joined. The surface area of new cuboid is
140 sqcm
1440 sqcm
144 sqcm
72 sqcm​

Answer 1

Answer:

1440 cm²

Step-by-step explanation:

the surface area of a new cuboid is 1440 cm²

Answer 2

Step-by-step explanation:

length of resulting cuboid is :

= 12cm + 12cm

=24 cm

breath and height remaining same i.e 12 cm each

surface area = 2( lb + bh + hl )

= 2 ( 24×12 + 12×12 + 12×24 )

= 1440 sqcm

so,

the surface area of new cuboid is 1440sqcm