Question

length of a cold storage is double its breadth. Its height is ... The length of a cold storage is twice its breadth. · Its height is 3 metres. The area of its four walls (including the doors) is 108 m2. Find its volume.

Answer 1

breadth=b
length=2b
height=3 m
LSA=2 (l+b)×h
2 (l+b)×h=108
2 (2b+b)=108
2 (3b)=108
6b=108
b=108/6
b=18
l=2b=2 (18)=36

volume=lbh=18×36×3=1944 m^3

Answer 2

let breadth=x m
length=2x m
h=3m
area of 4 walls= 2(bh+hl)=2(3x+6x)= 2(9x)=108
18x=108
x=6
length=2x=12m
breadth=x=6m
height=3m
volume=l*b*h=12*6*3=216m³