Question

A room is 30 m long and 24 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:
​

Answer 1

Area of floor + Area of ceiling = Area of four walls

⇒lb+lb=2×h×(l+b), where l, b, h are the length breadth and height of the hall

⇒lb=h×(l+b)

⇒15m×12m=h×(15m+12m)

⇒h=