A girl rows 10 km downstream in 2 h. Her return trip takes 3 h. How fast is the current. in km/

Answer 1

v = her speed
c = current speed
(v+c) * 2 = 10
(v-c) * 3 = 10

v + c = 5 = 15/3
v - c = 10/3
--------------subtract
2 c = 5/3
c = 5/6