Multiple choice

A man goes a distance of 2304 km down stream in x hours.and returns back a certain distance upstream the same time interval. If the speed of the current is 4 km/hr and speed of the boat is 15 times the speed of the current. Find the distance covered by the boat up in number of hours mentioned above.

  1. 2010

  2. 2012

  3. 2014

  4. Cannot be determinded

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Speed of current = 4 km/hr, speed of boat = 15 × 4 = 60 km/hr. Downstream speed = 60 + 4 = 64 km/hr. Time for 2304 km downstream = 2304/64 = 36 hours. Upstream speed = 60 - 4 = 56 km/hr. Distance upstream in 36 hours = 56 × 36 = 2016 km. None of A (2010), B (2012), or C (2014) match 2016 km.

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