A man swims downstream a distance of 15 km in 1 hour If the speed of the current is 5 km hr the time...........

Quantitative Aptitude ( CCS) Boats and Streams

A man swims downstream a distance of 15 km in 1 hour. If the speed of the current is 5 km/hr, the time taken by the man to swim the same distance upstream is

1 hr 30 min

45 min

2 hr 30 min

3 hrs

छोटे Courses बड़े Results

Master Boats and Streams

Prepare through Micro-courses

Try Now

Explanation:

Let the speed of boat in still water = x km/h
The speed of current, y = 5 km/h
Downstream speed = 15 km/h.
x + y = 15
x = 10 km/h
Upstream speed, U = x – y = 10 – 5 = 5 km/h
Upstream time = Distance/ Upstream speed
= 15/5 = 3 hours