Question

the area of 4 walls is 168 meter square. the breadth and height are 10 m and 4m respectively find the length

Answer 1

hey here,

let the length be x

area of four wall = 2 ( l + b ) * h

168 = 2 ( x + 10 ) * 4

168 = 8 ( x + 10 )

168 = 8x + 80

8x = 168 - 80

8x = 88

x = 11cm

hope it's help you...

Answer 2

area of a square=l*b*h 
168=l*10*4
168=40*l
l=168-40 
l=128 but this is length of 4 walls for length of 1 wall divide 128 by 4
=128/4 =32
32 is the length of wall