At Rs. 5 per m2, how much would it cost to paint the two adjacent walls of a hall that has no windows or doors? I. The hall is 24 square metres in size. II. The hall's width, length, and height are in the proportions of 4 : 6 : 5. III. One wall is 30 square metres in size.
A. I only
B. II only
C. III only
D. All I, II and III are requireD.
Answer:C
At Rs. 5 per m2, how much would it cost to paint the two adjacent walls of a hall that has no windows or doors? I. The hall is 24 square metres in size. II. The hall's width, length, and height are in the proportions of 4 : 6 : 5. III. One wall is 30 square metres in size.
A. I only B. II only C. III only D. All I, II and III are requireD.
Explanation: Let l = 4x, b = 6x, and h = 5x be the values from II.The hall's size is then (24x2) m2.The hall is 24 m2 in size, according to I.We obtain 24x2 = 24 x = 1 by multiplying II and I.l = 4 metres, b = 6 metres, and h = 5 metre.As a result, the area of two neighbouring walls = [(l x h) + (b x h)] m2 may be calculated, as well as the cost of painting two nearby walls.As a result, III is superfluous.