A certain number of persons can complete a work in 54 days. If there were 15 persons less, it would take 18 days more for the work to be completed. Initially, the number of persons is:
A and B are two points on a circle with centre O. C is a point on the minor arc of the circle between points A and B. The tangents to the circle at A and B meet each other at a point D. If ∠ADB = 25, then ∠ACB (in degrees) is equal to:
Section : General Awareness
Who among the following is an Indian diplomat elected to the United Nations Advisory Committee on Administrative and Budgetary Questions in November 2020?