Trains Boats and Streams Practice Test 1 with solutions

Question : 17 of 40

Marks: +1, -0

Archit can swim at a rate of 6 km/hour in the still water. Find the time taken by him to swim to a place 10 km downstream and back to the starting point if the rate of current is 1.5 km/hour.

3 hour
3.56 hour
4 hour
4.25 hour
None of these

Validate

Solution:

Down stream rate = 6 + 1.5 = 7.5 km/hour
Upstream rate = 6 - 1.5 = 4.5 km/hour
According to the question,

{10}/{7.5}+{10}/{4.5}

= 1.33 + 2.22 ≈ 3.56 hours.

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