The speed of a motor boat is that of the current of water as 36 : 5. The boat goes along with the current in… · ABC26GN3796
Subject: General Aptitude · Chapter: Boats and Streams
The speed of a motor boat is that of the current of water as 36 : 5. The boat goes along with the current in 5 hours 10 minutes. How much time will it take to come back? (S.S.C., 2007)
Answer
No answer key was printed for this question.
Explanation
Let the speed of the motor boat and that of the current be 36x km/hr and 5x km/hr respectively. Then, speed downstream = (36x + 5x) km/hr = 41x km/hr. Speed upstream = (36x – 5x) km/hr = 31x km/hr. Let the distance be d km. d 10 1 31 31 × 41 1271x Then, =5 =5 = ⇒ d= x= . 41x 60 6 6 6 6 d 1271x 1 41 5 \ Time taken while coming back = = × hrs = hrs = 6 hrs 31x 6 31x 6 6 = 6 hrs 50 min.
Explanation as extracted from the printed page; notation may be imperfect.