A grass lawn has an area of 2 2 5 m 2 and has become host to a parasitic weed. Let A m 2 be
A grass lawn has an area of m and has become host to a parasitic weed. Let A m be the area covered by the parasitic weed, t days after it was first noticed. The rate at which A is growing is proportional to the square root of the area of the lawn already covered by the weed. Initially the parasitic weed has spread to an area of m and at that instant the parasitic weed is growing at the rate of m per day. By forming and solving a suitable differential equation, calculate after how many days, the weed will have spread to the entire law
