a rectangular swimming bath is 1m deep at one end and increases uniformly in depth to 2.6m at the other end . the bath is 8m wide and 32m long and is emptied through an orifice of 0.2m^2 at its lowest point. assuming there are no losses at the orifice , find the time taken for :
a)the depth to fall by 1m
b)the depth to empty completely.