questionFromString.label: IBPS Clerk Prelims 2017

The ratio of a speed of a boat in downstream and speed of a stream is 9:1, if a speed of the current is 3 km per hr, then find the distance traveled (in km) upstream in 5 hours.

105

110

120

solution.label:

chapterName.label: Boats and Stream

speed of current = y = 3

Down stream speed = 9 × 3 = 27 km/h

Speed of boat = x

x + y = 27

x = 24 ; ∵ y= 3

Distance travelled upstream in 5 hr = speed × Time = (x – y) ×5

= (24 – 3) × 5 = 21 × 5= 105 km

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IBPS Clerk Prelims 2017

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