Question

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

Answer 1

Step-by-step explanation:

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 = 216÷30

h = 7.2 meters is the height of the wall

I think u Understand the answer.