Question

area of four wall of a room is 720 sq m, if the length is twice it's breadth and height is 12 m, find length and breadth of rom​

Answer 1

Answer:

Step-by-step explanation:

Breadth=10m and length=20m

Answer 2

Step-by-step explanation:

2× (L×H) + 2 × (B×H) = 720

where L - length

B - breadth

H - height

(L+B)× 2H = 720

(2B+B)×H = 360 ...... ( length is twice it's breadth)

3BH = 360

BH = 120

B×12 = 120. ................ ... .... ................ ( H=12 )

B = 10

L = 2B = 2×10 =20

SO,

Length = 20 m

Breadth = 10 m