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Area - General Aptitude

Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
Q1:

What is the area of the hall?
I.  Material cost of flooring per square metre is Rs. 2.50
II.  Labour cost of flooring the hall is Rs. 3500
 III.  Total cost of flooring the hall is Rs. 14,500.

A I and II only

B II and III only

C All I, II and III

D Any two of the three

E None of these

ANS:C - All I, II and III

  I. Material cost = Rs. 2.50 per m2  II. Labour cost = Rs. 3500. III. Total cost = Rs. 14,500. Let the area be A sq. metres.  Material cost = Rs. (14500 - 3500) = Rs. 11,000.

5A = 11000      A = 11000 x 2 = 4400 m2.
2 5
Thus, all I, II and III are needed to get the answer.  Correct answer is (C).