Multiple choice

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, then the volume of the hall is

  1. 720 m3

  2. 900 m3

  3. 1200 m3

  4. 1800 m3

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Areas of floor and ceiling = 2lb = 2 * 15 * 12 = 360 m2  Area of four walls = 2(l+b)h = 2(15 + 12)h = 360 h = 20/3 m Volume = l * b * h = (15 * 12 * 20)/3 = 1200 m3

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