A boat with still water speed of a is traveling upstream where the streams speed is b. After covering certain distance s, the boat turns back and tries to come to the starting place. But the boat stops at 3/4th of the intended distance due to a technical fault. What is the ratio of the time taken for the return journey to that of the upstream journey.
Select the correct option:	A) 3(a - b)/4(a + b)	B) 4(a - b)/3(a + b)	C) 3(a + b)/4(a - b)	D) 4/3	E) 4/8
speed of boat upstream = a - b   speed of boat downstream = a + b   For upstream journey, time taken = distance / speed = s / (a - b)   During return journey, the boat had covered on 3/4th of s :   Therefore for return journey, time taken = distance / speed = (3s/4)/(a+b)   Ratio of time taken for return journey to the upstream journey = (3s/4)/(a+b)/ (s/(a - b)) = 3(a - b)/4(a + b)   3(a - b)/4(a + b)NSWER:3(a - b)/4(a + b)
<result>A</result>
A boat with still water speed of a is traveling upstream where the streams speed is b. After covering certain distance s, the boat turns back and tries to come to the starting place. But the boat stops at 3/4th of the intended distance due to a technical fault. What is the ratio of the time taken for the return journey to that of the upstream journey.