Question

find the total surface area of cuboids of length,breath and height as below 1) 4 cm, 2.5 cm, 1.5 cm

Answer 1

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$\large\mathsf\red{Q \ - \ What \ is \ Cuboid \ ?}$

$\mathsf\blue{Cuboid \ is \ a \ solid \ which \ has \ 6 \ rectangular}$
$\mathsf\blue{ faces \ at \ right \ angles \ to \ each \ other.}$

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$\huge\mathfrak{Given \ -}$

$\mathsf{Length, \ l \ = \ 4 \ cm}$

$\mathsf{Breadth, \ b \ = \ 2.5 \ cm}$

$\mathsf{Height, \ h \ = \ 1.5 \ cm}$

$\mathsf{Using \ formula}$

$\mathsf\red{\boxed{\boxed{T.S.A. \ of \ cuboid \ = \ 2(lb + bh + hl)}}}$

$\large\mathsf\green{Putting \ values}$

$\mathsf{= \ 2[(4)(2.5) + (2.5)(1.5) + (1.5)(4)]}$

$\mathsf{= \ 2(10 + 3.75 + 6)}$

$\mathsf{= \ 2(19.75)}$

$\textbf\pink{T.S.A. \ of \ cuboid \ = \ 39.5 \ cm^2}$

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