MCQ PracticeThe radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?Subject: MathematicsTopic: VolumesA18 πr 2 sq unitsB3 πr 2 sq unitsC12 πr 2 sq unitsD6 πr 2 sq unitsCorrect 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