# Length, Breadth and Height of a Cuboid Shape Box of Medicine is 20 Cm, 12 Cm and 10 Cm Respectively. Find the Surface Area of Vertical Faces and Total Surface Area of this Box. - Geometry

Sum

Length, breadth and height of a cuboid shape box of medicine is 20 cm, 12 cm and 10 cm respectively. Find the surface area of vertical faces and total surface area of this box.

#### Solution

Lenght of the box, l = 20 cm
Breadth of the box, b = 12 cm
Height of the box, h = 10 cm

∴ Surface area of the vertical faces of the box
= 2(l + b) × h
= 2(20 + 12) × 10
= 2 × 32 × 10
= 640 cm2

Also,
Total surface area of the box
= 2(lb + bh + hl)
= 2(20 × 12 + 12 × 10 + 10 × 20)
= 2(240 + 120 + 200)
= 2 × 560
= 1120 cm2

Thus, the surface area of vertical faces and total surface area of the box is 640 cm2 and 1120 cm2, respectively.

Concept: Surface Area of a Cuboid
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#### APPEARS IN

Balbharati Mathematics 2 Geometry 9th Standard Maharashtra State Board
Chapter 9 Surface Area and Volume
Practice Set 9.1 | Q 1 | Page 115
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