Question

The length of the hall is 20 m and its width is 12 m. 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:

sum of the areas of the floor and the roof is

2(20×12)sqm=480 sqm

if the height of the wall is h meter then sun

of the area of thefour walls is

2(20×h+12×h)sqm

2.32h sqm=64h sqm

64 h=480

h=480/64=15/2

so the height of the wall is 15/2m=7.5m