Equal distance is covered by a boat in upstream and in downstream in total 5 hours Sum of speed of a...........

Quantitative Aptitude (SBI-CL) Boats and Streams

Equal distance is covered by a boat in upstream and in downstream in total 5 hours. Sum of speed of a boat in upstream and downstream is 40 km/hr. Speed of boat in still water is 600% more than the speed of stream. Find the approximate distance covered by boat in downstream (in km).

Explanation:

Speed of boat in still water = 20 km/hr
Speed of stream = 20/7 km/hr
Ratio of speed of boat in upstream to that of downstream = 6 : 8 ⇒ 3 : 4
Time taken by boat in upstream to that of downstream = 4 : 3