There are two tanks next to each other having cross sectional area `A_(1)` and `A_(2)`. They are interconnected by a narrow pipe having area of cross section equal to `A_(0)`. Initial height of water in the two tanks is `h_(1)` and `h_(2)` meaured from the level of the pipe. Assume that the flowis ideal and behaves in a way similar to the discharge in air. Calculate the time needed for the water level in two tanks to become same.