Question

please complete in a process

Answer 1

(1A) Length = 13cm,
Breadth = 5cm,
Height = 2cm,

T.S.A of a cuboid = 2(lb+bh+hl)

=> T.S.A of the cuboid = 2(65+10+26)
=> 2(101)
=> 202 cm²,

Lateral Surface area of cuboid = 2h(l+b)
=> 2*2(18)
=> 72 cm²,

Now ,

(2A) Side of cube = 7cm,

Total surface area of a cube = 6a² where a is Length of the side,

Now total surface area of cube = 6*7²

=> 6*49 = 294 cm²,

Lateral surface area of a cube = 4a²,

=> 4*7²
=> 4*49 = 196cm²,

Now,

(3A) Edge means nothing but side of a cube,

Let us assume side of a cube as x,

Surface area means Total Surface area,

Now, Total Surface area = 6x²,

Let us triple the edge, Now new side = 3x,

New lateral surface area = 6(3x)² = 6*9x² = 54x² ,

So the new surface area is 9 times the original surface area,

I hope you understand all these solutions, Have a great day !!

Answer 2

please mark as brainalist .Thank you