Question

two cubes each of 20cm edge are joined end to end, find the surface area of the resulting cuboid.​

Answer 1

Step-by-step explanation:

a=20cm

when joined together it becomes a cuboid of

length=40cm

breadth=20cm

height=20cm

sa=2(lb+bh+hl)

2(800+400+800)

2(2000)

4000 cm^2

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Answer 2

Solution :-

given=> 1) two cubes each of 20cm edge are joined end to end,

so,

we know formula for surface area of cuboid..

SA=2lw+2lh+2hw

where, l = length, w = width, h= height

l = 2×20 = 40 cm by given

h = 20cm

w = 20 cm

by Formula

SA = 2×40×20 +2×40×20+2×20×20

SA= 1600+1600+800

SA = 4000cm³

surface area of two cubes each of 20cm edge are joined end to end is 4000cm³.

I hope it helps you.......