Question

15 hours is taken by a boat to reach its destination in still water and return to its starting point from there. The same journey requires 16 hours if the river flows. The difference between the speed of boat and the river is 15 km/hr. Find the speed of the flow of river.

• A. 10 km./hr.
• B. 6 km./hr.
• C. 4 km./hr.
• D. 5 km./hr.

Answer 1

Answer: (D)