MCQ PracticeThere are 21 poles with a constant distance between each pole. A car takes 30 seconds to reach the 16th pole. How long does it take to reach the last pole?Subject: MathematicsTopic: Time DistanceA39 secondsB40 secondsC39.38 secondsD39.5 secondsCorrect 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