I**mportant formulas**

- Speed of boat =x Km/hr
- Speed of current=y km/hr
- Speed of the boat downstream =(x+y) km/hr
- Speed of the boat upstream =(x-y)km/hr
- Speed of boat in still water=
- Speed of current in still water=

**Problem 1:** A boat running downstream covers a distance of 24km in 4hours, While for covering the distance upstream it takes 6 hours what is the speed of the boat in still water?

Solution:

Downstream =

Upstream =

Speed of boat in still water =

=

**Problem 2:** A boat running downstream cover a distance of 30km in 2 hours while coming back the boat takes 6 hours to cover the same distance. If the speed of the current is half that of the boat, What is the speed of the boat in km/h?

Solution:

Downstream =

Upstream =

Speed of boat in still water =

=

**Problem 3:** Ram goes downstream with a boat to some destination and returns upstream to his original place in 6hours. If the speed of the boat in still water and the stream are 12km/hr and 5km/hr respectively, then find the distance of the destination from the starting position?

Solution:

Downstream =12+5=17km/h

Upstream = 12-5=7km/h

Distance=Speed*Time

Average speed = =

d = =