Aman launches his boat from point a on the back of a straight river, 3km wide, and wants to reach point b, 8km downstream on the opposite bank, as quickly as possible. he could row his boat directly across the river and then run to b, or he could row to some other point across the river and then run to b. if he can row 6km/hr and run 8km/hr, where should he land to reach b as soon as possible?