A man can row at a speed of 15 km hr in still water to a certain upstream point and back to the star...........

Quant (SSC) Boats and Streams

A man can row at a speed of 15 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 9 km/hr. Find his average speed for total journey.

10.4 km/hr

8.4 km/hr

9.1 km/hr

9.6 km/hr

छोटे Courses बड़े Results

Master Boats and Streams

Prepare through Micro-courses

Try Now

Explanation:

When the distance is same, then average speed throughout journey would be:
Speed downstream * Speed upstream/speed in still water.
So here average speed = (15+9)*(15-9)/15 = 9.6 km/hr

Report error

Submit Error

Let's Discuss

Post Comment

Explore
Micro
Courses

Free
Video
Courses

Free
Test
Series

Free
PDF
Documents