How Much Time Taken by the Boat? If

A boat can travel with a speed of 13 km/hr is still water. If the speed of stream is 4 km/hr in the same direction, time taken by boat to go 63 km in opposite direction is:

  1. 60/17 hrs
  2.  4 hrs
  3.  7 hrs
  4.  9 hrs
Monis Rasool Professor Asked on 28th August 2015 in Maths.
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1 Answer(s)

Answer : (3) 7 hrs
Explanation:-
The speed of the boat = 13 km/hr
The speed of the river = 4 km/hr

Then, the speed of the boat in opposite direction = 13 – 4
= 9 km/hr
The distance covered by boat = 63 km/hr

Then, the time taken by the boat to covered the distance 63 km = 63/9
= 7 hrs

Hence, the answer is (3) 7 hrs.

Anurag Mishra Professor Answered on 28th August 2015.
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