An air blast of sprayer is to be operated at 3 km/h and application rate is 18 l/tree. The spacing is 9m*9m and each nozzle delivers 5 lit/min and operating process of 4*10^5 N/m^2. If one half row is sprayed from each side of the machine. How many sprayers will be needed?
(a) 30
(b) 50
(c) 20
(d) 40
I had been asked this question in class test.
My question is from Plant Protection Equipments topic in chapter Plant Protection Equipments of Farm Machinery