MCQ PracticeIf m men can do a work in r days, then the number of days taken by (m + n) men to do it is:Subject: MathematicsTopic: Time And WorkAm + nmnBm + nmrC(mr)/(m) + nDrleft(m + n)mnCorrect Answer: CPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the