MCQ PracticeIf the length of the diagonal of a square is 20 cm, then its perimeter must be :Subject: MathematicsTopic: AreasA$$10sqrt 2 ,$$ cmB$$40 $$ cmC$$40sqrt 2 ,$$ cmD$$ 200 $$ cmCorrect 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