Trains Boats and Streams Practice Test 2 with solutions

Question : 10 of 40

Marks: +1, -0

A man can row 5 km/hr in still water and the speed of the stream is 1.5 km/hr. He takes an hour when he travels upstream to a place and back again to the starting point. How far is the place from the starting point?

2.275 km
3.5 km
1.5 km
None of these

Validate

Solution:

Let required distance be x km, then

x/{5-1.5} + x/{5+1.5}

= 1
⇒

{x+2}/7+{x×2}/{13}

= 1
⇒ 40x = 91
∴ x = 91/40 = 2.275 km

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