A boat moves downstream at the rate of 1 km in 71minutes

A boat moves downstream at the rate of 1 km in 7 1 minutes and upstream at the
2
rate of 5 km an hour. What is the speed of the boat in the still water?

Rate downstream of boat =	2 × 60	= 8 kmph
	15

Rate upstream of boat = 5 kmph

∴ Speed of boat in still water =	1	(Rate downstream + Rate upstream)
	2

Speed of boat in still water =	1	(8 + 5) =	13	kmph
	2		2

Speed of boat in still water = 6	1	kmph
	2

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

p =	2 × 60	= 8 kmph
	15

q = 5 km/hr

Speed of Boat =	1	(p + q)
	2

Speed of Boat =	1	(8 + 5)
	2

Speed of Boat = 6	1	km/hr
	2

A boat moves downstream at the rate of 1 km in 7	1	minutes and upstream at the
	2

3	1	km/hour
	2

6	1	km/hour
	2