Trains Boats and Streams Practice Test 1 with solutions

Question : 37 of 40

Marks: +1, -0

A man can row at 5 km/hr in still water. If the velocity of the current is 1 km and it takes him 1 hour to row to a place and come back, how far is the place?

3.6 km
3 km
2.5 km
2.4 km

Validate

Solution:

Let the distance of the place be x km, then

x/{5+1} + x/{5-1}

= 1
⇒

x/6+x/4

= 1
∴

{5x}/{12}

= 1
∴ x =

{12}/5

= 2.4 km

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