Question

two cubes each of volume27cmsquare are joined end to end find the surface area of resulting cuboid​

Answer 1

Answer:

90 cm²

Step-by-step explanation:

Volume = 27 cm³

Therefore ,

Side = Cube root of 27 = 3 cm

Area of one square on the cube = 9 cm²

TSA of one cube = 9*6 = 54 cm²

The cubes are joined end-to-end .

Therefore two sides would be merged .

Therefore ,

TSA of cuboid = 2(54) - (9)2 { Two cubes and two sides merged }

                        = 90 cm²

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Answer 2

Answer:

Volume of cube = (side) ^3

Therefore

Let side would be "a"

So, ATQ

a×a×a=27

a=3

Now, when two cubes are attached the it becomes a cuboid whose

Length=6cm and breadth=3 cm and hight =3cm

Now we have to find the area of cuboid

So, area of cuboid=2×(l×b)+(bxh)+(h×l)

2{(6×3) +(3×3) +(3×6)}

2{18+9+18}

=2x45

=90cm sq

So area of cuboid =90cm sq unit