MCQ PracticeA and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in__________?Subject: MathematicsTopic: Basic MathsA20 daysB30 daysC40 daysDnone of theseCorrect Answer: BPractice 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