Question

three cube of side 20cm are joined end to end. find the surface area of the resulting figures ​

Answer 1

When three cubes are joined together, the resulting cuboid’s length will change but the breadth and height will remain the same.

Thus, l = 20+20+20= 60 cm, b = 20 cm, h = 20 cm

We know that,

Surface Area of a Cuboid = 2(lb+bh+hl)

= 2(60*20 + 20*20 + 20*60)

= 2(1200 + 400 + 1200)

= 5600 cm^3

Answer 2

answer is 3200

Step-by-step explanation:

when 3 cubes join cuboid is formed.

in this side of a cube =20cm

in cuboid

length= 20+20+20=60

breadth=20

height=20

surface area of a cuboid = 2h[l+b]

= 2*20[60+20]

=3200