A boat goes 40 km upstream in 8 hours and 36 km downstream

A boat goes 40 km upstream in 8 hours and 36 km downstream in 6 hours. The speed of the boat in still water is :

Given that , Speed upstream =	40	= 5 kmph
	5

Speed downstream =	36	= 6 kmph
	6

∴ Speed of boat in still water =	Rate downstream + Rate upstream
	2

Speed of boat in still water =	1	(5 + 6) = 5.5 km/hrs
	2

We can find the required answer with the help of given formula :

Here, p =	36	= 6 km/hrs
	6

q =	40	= 5 km/hrs
	8

Speed of Boat =	1	(p + q)
	2

Speed of Boat =	1	(6 + 5) = 5.5 km/h
	2