2013 · Q6
A sailor sails a distance of 48 km along the flow of a river in 8 hours. If it takes 12 hours to return the same distance, then the speed of the flow of the river is
Elementary MathematicsArithmetic
- A1 km/hr
- B1 km/hr
- C5 km/hr
- D2 km/hr
Explanation
Downstream 6 km/h, upstream 4 km/h; stream = (6−4)/2 = 1 km/h. Answer B.