Question

the three cube side a are join and to end what is the surface area of new solid thus formed
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Answer 1

The length of each side of the cube = a

By our observation from the diagram made, a cuboid is formed.

where,

• Length 'l' = a + a + a = 3a
• Breadth 'b' = a
• Height 'h' = a

We know,

TSA of Cuboid = 2(lb + bh + lh)

∴ TSA of the cuboid:-

2(3a × a + a × a + a × 3a)

= 2(3a² + a² + 3a²)

= 2(7a²)

= 14 a²

∴ Surface Area of the solid figure so formed is (14 a²).

@Psyclone