A boat has to travel upstream 20 km distance from point X of a river to point Y. The total time taken by boat in travelling from point X to Y and Y to X is 41 minutes 40 seconds. What is the speed of the boat? Pick one:  A) 66 km/hr  B) 72 km/hr  C) 48 km/hr  D) Data inadequate  E) None of these
Let x be the speed of the boat.   and y the speed of the current.   20/x−y+20/x+y=25/36   In this equation there are two variables, but only one equation, so, the value of ‘x’ cannot be determined.   Answer Data inadequate
<result>D</result>
A boat has to travel upstream 20 km distance from point X of a river to point Y. The total time taken by boat in travelling from point X to Y and Y to X is 41 minutes 40 seconds. What is the speed of the boat?