Question

length,breadth and height of a room is 7.5 m, 6m and 4m then the area of foor wall room will be what? full solution

Answer 1

Given:

Area of 4 walls= 660 m²

Height (h)= 11 m

Let the width be = b m

Length (l)= 2b m

Area of 4 walls of a room = 2(l+b)×h

660 = 2 (2b+ b ) × 11

660 = 2(3b) ×11

3b = 660 / 11× 2= 60/2= 30

3b = 30

b= 30/3= 10

b= 10 m

L = 2b = 2× 10= 20 m

L = 20 m

Area of ceiling = l × b

Area of ceiling= 20 × 10 = 200 m²

Hence, the area of ceiling is 200 m²

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Answer 2

it is given l=7.5m,b=6m,h=4m
now a floor is made by length and breadth so the area of floor will be 7.5×6m^2=45m^2
now wall is made up of breadth ,height , length 2 walls are of length and height and 2 of breadth height
therefore area of wall = 2(ar of length height wall + ar breadth height side)
=2(7.5×4+6×4)
=2(30+24)
=108m^2
Now area of whole room =ar of walls+ celling+floor and we know celling is also made up of length and breadth
therefore ar of whole room=108+45×2
=108+80=198m^2
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