A godown is 15 m long and 12 m broad. The sum of the areas of the floor and the ceiling is equal to the sum of areas of the four walls. The volume (in m3) of the godown is:

If the height of the godown be h metre, then

2(15 × 12) = 2 × h(15 + 12)

$\Rightarrow 27 \mathrm{~h}=15 \times 12$

$\Rightarrow \mathrm{h}=\frac{15 \times 12}{27}=\frac{20}{3}$ metre

$\therefore$ Volume of the godown $=\frac{15 \times 12 \times 20}{3}$

= 1200 cu.metre