Trains Boats and Streams Practice Test 5 with solutions

Question : 4 of 8

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The rate of current is 7 km/hour and speed of boat in still water is 23 km/hour. Find the total time taken by a man to go 48 km downstream and come back to the starting point.

4 hours
5 hour 36 minutes
5 hours
$5 1/2$ hours
$5 2/3$ hours

Validate

Solution:

Rate downstream = 23 + 7 = 30 km/hour
Rate upstream = 23 - 7 = 16 km/hour
Total time taken =

{48}/{30}+{48}/{16}

= 5 hour 36 minutes

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