40 किमी प्रवाहाच्या विरुद्ध दिशेने ठराविक अंतर जाण्यासाठी एका खलाशीला 8 तास लागतात तर प्रवाहाच्या दिशेने समान अंतरावर जाण्यासाठी तिला फक्त 5 तास लागतात. तर स्थिर पाण्यात खलाशीचा वेग किती होता?

This question was previously asked in
RRB ALP Previous Paper 8 (Held On: 13 Aug 2018 Shift 3)
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  1. 1.5 किमी/तास 
  2. 4.5 किमी/तास
  3. 6.5 किमी/तास
  4. 4 किमी/तास

Answer (Detailed Solution Below)

Option 3 : 6.5 किमी/तास
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Detailed Solution

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x हा खलाशीचा वेग मानू आणि y हा पाण्याचा सध्याचा वेग मानू.

प्रवाहाच्या विरुद्ध दिशेने जात असताना वेग = (x –y)

⇒ 40/ (x – y) = 8

⇒ x – y = 5      ---- (1)

आता प्रवाहाच्या दिशेने जात असताना वेग = (x + y)

⇒ 40/ (x + y) = 5

⇒ x + y = 8      ----(2)

समीकरण 1 आणि 2 वरून आपल्याला मिळते

x = 6.5 किमी/तास

खलाशीचा वेग = 6.5 किमी/तास

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