Area - Arithmetic Aptitude Questions and Answers

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What is the cost painting the two adjacent walls of a hall at Rs. 5 per m² which has no windows or doors?

I. The area of the hall is 24 sq. m.

II .The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.

III. Area of one wall is 30 sq. m.

I only

II only

III only

Either I or III

All I, II and III are required.

Answer : Option C

Explanation :

From II, let l = 4x, b = 6x and h = 5x.

Then, area of the hall = (24x²) m².

From I. Area of the hall = 24 m².

From II and I, we get 24x² = 24 x = 1.

l = 4 m, b = 6 and h = 5 m.

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 be found out.