Question

Area of four walls of a room is 120 square if the length of room is twice the breadth and the height is 4 metre find the area of the floor

Answer 1

Step-by-step explanation:

Area of room =120sqm

breadth=x

length =2x

height =4m

According to question ,

A=120sq

L×B×H=120

(2x)(x)(4)=120

(2x)(x)=120÷4

2x^2=30

x2=30÷2

x^2=15

x=root 15

Breath =root 15

Length =2(root 15)

=root60

Area of floor=lb.

=root15×root30

=30metersq

Answer 2

Answer:

The area of the floor is 50 m²

Step-by-step explanation:

Let,

Breadth (b) = x m

Length (l) = 2x m

Height = h

As we that

Area of 4 walls of a room = 2 h (l + b)

➨ 2 × ( length + breadth) × height

➨ 2 × (2x + x) × 4 = 120

➨ 8 × 3x = 120

➨ 24x = 120

➨ x = 120 / 24

➨ x = 5

So,

★ Breadth = 5 m

Length = 2x m

➨ 2 (5)

➨ 2 × 5

➨ 10

★ Length = 10 m

• The area of the floor = length × breadth

➨ 10 × 5

➨ 50

➨ 50 m²

Therefore,

The area of the floor is 50 m²