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1600 CAT Questions, 300 Video Solutions and 41 Topic Wise Tests

CAT Algebra questions from Linear equations and Quadratic equations that appear in the Quantitative Aptitude section of the CAT Exam consists of concepts from Equations and Algebra. Get as much practice as you can in these two topics because the benefits of being good at framing equations can be enormous and useful in other CAT topics as well. In CAT Exam, one can generally expect to get 1~2 questions from Linear Equations and Quadratic Equations. Make use of 2IIMs Free CAT Questions, provided with detailed solutions and Video explanations to obtain a wonderful CAT score. If you would like to take these questions as a Quiz, head on here to take these questions in a test format, absolutely free.

Environmental Engineering
Q1.

A drain carrying 5 m^3/s of wastewater with its BOD of 100 mg/L join a stream carrying 50m^3/s flow with its BOD of 5 mg/L . What will be the value of the BOD of the combined flow after complete mixing?

〖BOD〗_mix= (Q_s  〖BOD〗_s+ Q_R  〖BOD〗_R)/(Q_s  + Q_R )
                = (5*100 + 50 * 5)/(5+50)= 13.6 mg/L