A conventional water treatment plant treats 2.40m^3*s^-1 of river water. The filters in the plant are 8.0x8.0m surface area and operate on the following schedule. A filter is cleaned once in each 24-hr period, and a backwash rate is 10.0 L*m^-2*s^-1 fora period of 8 min. it takes an additional 8 min to drain the filter and break up the media with air injection. of the total fitler cylce time of 24 hours, 15 mins is used for rinsing the filter after backwashing. During production, water is applied to the filter at a rate of 5.50 L*m^-2*s^-1
(a) What is the filter efficiency?
(b) What is the minimum number of filters required by plant?