What is the length of each subinterval if the interval 1 3 is-18405

What is the length of each subinterval, if the interval [1,3] is divided into n sub interval of equal length?

This multiple choice question (MCQ) is related to the book/course vu mth101 Calculus And Analytical Geometry. It can also be found in vu mth101 Final Term - Quiz No.3.