If Aneesha travels at a rate of 50 miles............................1h and 1mile=5280ft, therefore 50 miles = 264000 ft and 1 h =3600 seconds we can say that Aneesha travels
264,000 ft in 3600 seconds or 264,000/3600= 73.33 ft/s
Morris travels 3 ft per second less than her so 73.33-3=70.33 ft/s for Morris