Question

please give me answer​

Answer 1

WRITTEN BY FFdevansh

Your required answer mate

The orange colour is the hemisphere cut from the cube.

So the new structure has 3 types of surfaces.

Blue/grey - 5 sides of cube, sides =a

Orange - hemispherical surface, radius = a/2

Yellow- Portion of 1 side of cube after cutting

Blue = 5 a2

Yellow = a2−pi(a/2)2

Orange = 2pi(a/2)2

Total = 5 a2 + a2−pi(a/2)2 + 2pi(a/2)2

Answer 2

$\Huge\bf\maltese{\underline{\green{Answer°᭄}}}\maltese$

$\implies$$\large\bf{\underline{\red{VERIFIED✔}}}$

$It \: is \: given \: that \: a \: hemisphere \: of \\ radius  \: \frac{1}{2} \:  is \: cut \: out \: from \\ the \: top \: face \: of \: the \\ cuboidal \: wooden \: block. \\ Therefore, \: surface \: area \: of \: the \: remaining \\ solid \: = surface \: area \: of \: the \\ cuboidal \: box \: whose \: each \: edge \: is \\ of \: length \:  l − Area \: of \: the \: top \: of \: the \: hemispherical \\ part + curved \: surface \: area \: of \: the \: hemispherical  \: part</p><p>=6 {l}^{2} −π {r}^{2} +2π {r}^{2} \\=6 {l}^{2} −π( \frac{1}{2} {)}^{2} +2π( \frac{1}{2} {)}^{2} \\ =6 {l}^{2} − \frac{π {l}^{2} }{4} + \frac{π {l}^{2} }{2} \\ = \frac{ {l}^{2} }{4} (24+π) sq.units$

$\boxed{I \:Hope\: it's \:Helpful}$