Question

Q1. The surface area of
cuboid having L= 80 cm,
B=40 cm and h = 20 cm is
*
O 11200 sq cm
O 13000 sq cm
O 13400 sq cm​

Answer 1

Option (A) 11200 cm²

S O L U T I O N :

Given :

• Height of cuboid (h) = 20 cm
• Length of cuboid (l) = 80 cm
• Breadth of cuboid (b) = 40 cm

To Find :

• The total surface area of cuboid.

Explanation :

Let, total surface area be "R".

We know that,

Total surface area = 2(lb + bh + lh)

[ Put the values ]

⟶ R = 2(80 × 40 + 40 × 20 + 80 × 20)

⟶ R = 2(3200 + 800 + 1600)

⟶ R = 2(5600)

⟶ R = 11200 cm²

Therefore,

The total surface area of cuboid is 11200 cm².