Direction: Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to study the questions and decide the data in which of the statements are sufficient to answer the questions.
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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 m2.
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 m2.
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- Only I
- Only II
- Only III
- Either I or III
- Data inadequate.
Correct Option: E
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.
