If two connected tanks as tank-1 contains 1500 gal of water in which initially 200 lb of fertilizer are dissolved and tank 2 contains 2000 gal of water in which initially 300 lb  of fertilizer are dissolved. Fresh water runs in the tank-1 at the rate of 60gal/h. The mixture is pumped from each tank to the other at the rates that is 90 gal/h from tank-1 to tank-2 and 30 gal/h from tank-2 to tank-1. In addition, the mixture flows out from tank-2 at rate 60 gal/h. Find the amount of fertilizer in each tank at the end of 6 min by using RK-2 method. Need Step By Step Detailed Solution Thanks.