Question

TWO CUBES WITH 12cm EDGE are joined end to end. Find the surface area of the resulting cuboid.

Answer 1

hello users ....

solution :-
we know that :
surface area of cuboid = 2 [ lb + bh + hl ]

According to given :
Dimension of cube :
Length = breadth = height = 12 cm

length of cuboid = sum of length of two cubes.
= a + a = 12 + 12 = 24 cm
and
breadth of cuboid = breadth of cube = 12 cm

and 
height of cuboid = height of cube = 12 cm 

Here,
surface area of cuboid 
= 2 * [ 24*12 + 12*12 + 12 * 24 ]
= 2 * [288 + 144 + 288]
= 2 * [720]
= 1440 cm² Answer 

#hope it helps :)

Answer 2

Answer:

Step-by-step explanatiowe know that :

surface area of cuboid = 2 [ lb + bh + hl ]

According to given :

Dimension of cube :

Length = breadth = height = 12 cm

length of cuboid = sum of length of two cubes.

= a + a = 12 + 12 = 24 cm

and

breadth of cuboid = breadth of cube = 12 cm

and  

height of cuboid = height of cube = 12 cm  

Here,

surface area of cuboid  

= 2 * [ 24*12 + 12*12 + 12 * 24 ]

= 2 * [288 + 144 + 288]

= 2 * [720]

= 1440 cm² Answer  

#hope it helps :)n: