A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is
Choose the correct choice from the following.
A) 720  B) 900  C) 1200  D) 1800  E) none

Rationale: "solution 2 ( 15 + 12 ) × h = 2 ( 15 x 12 ) ‹ = › h = 180 / 27 m = 20 / 3 m volume = ( 15 × 12 × 20 / 3 ) m 3 ‹ = › 1200 m 3 . answer c"
Answer: C