# A Cuboidal Box is 5 Cm by 5 Cm by 4 Cm. Find Its Surface Area. - Mathematics

A cuboidal box is 5 cm by 5 cm by 4 cm. Find its surface area.

#### Solution

$\text { The dimensions of the cuboidal box are 5 cm }\times 5 cm \times 4 cm .$

$\text { Surface area of the cuboidal box = 2 } \times (\text { length } \times \text { breadth + breadth } \times \text { height + length }\times \text { height })$

$= 2 \times (5 \times 5 + 5 \times 4 + 5 \times 4)$

$= 2 \times (25 + 20 + 20)$

$= 130 {cm}^2$

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#### APPEARS IN

RD Sharma Class 8 Maths
Chapter 21 Mensuration - II (Volumes and Surface Areas of a Cuboid and a Cube)
Exercise 21.3 | Q 3 | Page 22