Question

 A room of cuboidal shape with length 10cm, breadth 20cm and height 35cm is made. Find the Area of four walls of the room.
1. 2100 cm²
2. 2000 cm²
3. 2300 cm²
4. 2500 cm²

Answer 1

Correct Answer - Option 1 : 2100 cm²

Given:

 A room of cuboidal shape with length 10cm, breadth 20cm and height 35cm is made. 

Concept used:

Lateral surface area of cuboid.

Calculation:

Area of four walls = Lateral surface area of cuboid.

Here the room is of cuboidal shape.

Lateral surface area of cuboid = Perimeter of Base × Height 

Perimeter of Base = 2(L + B)

Lateral surface area of cuboid = 2(L + B) × H

Area of four walls = 2(10 + 20) × 35

Area of four walls = 60 × 35

Area of four walls = 2100 cm²