Question

The area of the four walls of a hall room is 336 sq m. The breadth and height of the room are 18m and 4m respectively. Find the length of the hall room

Answer 1

area of four wall = 2 (l+b)h
= 2(l+18)4
=32×4(l)
= 128×l
336=128×l
l=336/128
length =2.625m

Answer 2

area of the four walls=

2 (l+b)h=336

= 2 (1+18)4=336

=41+36=336

41-336-36

41= 300

1= 300/4

I=75 m