A man can swim with a speed of 4 "km h"^(-1)in still water. How lonu does he lake lo Cross a river 1 km wide if the 0.81 in river flows steadily at 3 "km h"^(-1)and he makes his strokes normal to the river current?

A man can swim with a speed of 4 "km h"^(-1)in still water. How lonu d

1.	A man can swim with a speed of 4 "km h"^(-1)in still water. How lonu does he lake lo Cross a river 1 km wide if the 0.81 in river flows steadily at 3 "km h"^(-1)and he makes his strokes normal to the river current?
Answer» 5 min 10 min 15 min 20 min SOLUTION :TIME to cross the river , `t = ("width of river")/("SPEED of man") = (1 km)/(4 km h^(-1))=1/4h = 15 min`