Some examples of the native language taken away from its people and/or imposition of the language of the conqueror are:
(a) Portuguese becoming the lingua franca of Angola.
(b) English imposed on the various Celtic peoples.
(c) Spanish imposed on the Basques and the Catalans.
(d) Turkish imposed on the Kurds.
A cylindrical tank of radius 10 cm is being filled with sugar at the rate of 100π cm3/s. The rate at which the height of the sugar inside the tank is increasing is: