Afisherman travels 8 miles downstream with the current in the same time that he travels 3 miles upstream against the current. if the speed of the current was 5 mph what is the speed at which the fisherman travels in still water?

I also need help with this too so I'm just here to wait and see the answer

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐