Question

The length of a hall is 18m and the width 12m. The sum of the areas of the floor and the roof equal to the sum of the areas of 4 walls. Find the height of the wall.

Answer 1

Let h = the height of the wall
:
Find the sum of the areas of the floor and the roof: 2(18*12) = 432 sq/ft
:
two walls 18' long + two walls 12' long = 432
2(18h) + 2(12h) = 432
simplify, divide by 2
18h + 12h = 216
30h = 216
h = 
h = 7.2 meters is the height of the wall

Answer 2

Answer:

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Step-by-step explanation:

ANSWER

Let the height of the hall be h metres

Let the height of the hall be h metresWe have, l=18m and b=12m

Let the height of the hall be h metresWe have, l=18m and b=12mNow,

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)h

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h=

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+b

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb =

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb = 18+12

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb = 18+1218×12

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb = 18+1218×12

Let the height of the hall be h metresWe have, l=18m and b=12mNow,Sum of the areas of the floor and roof = Sum of the areas of four walls2lb=2(l+b)hlb=(l+b)h⇒ h= l+blb = 18+1218×12 =7.2m