What is the cost of painting the two adjacent walls of a hall which has no windows or doors?
I. The area of the hall is 24 m ².
II. The breadth, length and the height of the hall are in the ratio of 4 : 6 : 5.
III. Area of one wall is 30 m ².

As per given all statements , we can see that
I. The area of the hall = 24 m²
II. The ratio of breadth, length and the height of the hall = 4 : 6 : 5
From II, Let L = 4x , B = 6x and H = 5x
Then, area of the hall = L × B = 4x × 6x
= 24x² m²
? Area of the hall = 24 m²
? 24x² = 24 ? x = 1 m
L = 4 x 1 = 4 m, B = 6 x 1 = 6 m and H = 5 x 1 = 5 m.
III. Area of one wall = 30 m²
Thus, area of two adjacent walls = [( L x H ) + ( B x H )] m² can be found out and so the cost of painting two adjacent walls may not be found out.
Cost of painting is not given, hence data inadequate.