The time taken by a boat to travel 13 km downstream is the same as the time taken by it to travel 7 km upstream. If the speed of the stream is 3 km/h, then how much time (in hours) will it take to travel a distance of 44.8 km in still water?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e 
Let the speed of Boat in still water be "x"
Then, Speed of boat downstream = (x + 3)
Speed of the boat upstream = (x - 3)
ATQ,
⇒ 13 / (x + 3) = 7 / (x - 3)
⇒ 13x - 39 = 7x + 21
⇒ 6x = 60
⇒ x =10
Now, time taken to travel a distance of 44.8 km = 44.8 / 10
= 4.48 =