Question

b) Find the total surface area of a cuboid. If length = 7 cm, breadth = 2.5 cm and height = 2 cm.​

Answer 1

Step-by-step explanation:

Surface area of cuboid - - - >{Ib+bh+Ih} +ATQ,

Answer 2

$\large \underline{\underline{\bf Given}} :$

• Length of cuboid = 7 cm
• Breadth of cuboid = 2.5 cm
• Height of cuboid = 2 cm

$\large \underline{\underline{\bf To \: Find}} :$

• Total surface area of cuboid = ?

$\large \underline{\underline{\bf Solution}} :$

As, we have :

• Length of cuboid, l = 7 cm
• Breadth of cuboid, b = 2.5 cm
• Height of cuboid, h = 2 cm

We know that :

$\large \underline{\underline{\boxed{\bf Total\: surface \: area \: of \: cuboid = 2(lb + lh + bh)}}}$

By substituting values :

$\sf : \implies TSA = 2(7 × 2.5 + 2.5 × 2 + 7 × 2)$

$\sf : \implies TSA = 2(17.5 + 5 + 14)$

$\sf : \implies TSA = 2(36.5)$

$\sf : \implies TSA = 73 cm^2$

$\underline{\sf Hence,\: Total \: surface\: area\: of \: given\: cuboid = \pink{73\: cm^2.}}$