Hi,

a boat takes 3 hours to travel 30 km down a river, 

then 5 hours to return. how fast is the river flowing?

Note:  D/t = r

 r + c = 10  

 r - c = 6   

 2r = 16

  r = 8   and c = 2kmph, how fast the river is flowing 

RELATED QUESTIONS

A boat running at its' top speed takes 3.0 hours to travel 12 km down a river. It then... (answered by Alan3354)

A boat takes 4.0 hours to travel 33 km down a river, and 5 hours to return. Express your... (answered by ikleyn)

The mad river flows at a rate of 2 KM/H. In order for a boat to travel 79.2 KM of River... (answered by stanbon)

It takes a boat 4 hours to travel 56 miles down a river, and 3 hours longer to make the... (answered by rmromero)

It takes a boat 4 hours to travel 24 miles down a river and 6 hours to return upstream to  (answered by checkley77)

A ferry boat takes people up and down the river 40 miles between two towns. The boat... (answered by ankor@dixie-net.com)

A boat takes 1 hour to travel 12 miles down river (with the current). Against the same... (answered by ikleyn)

it takes a botat 2 hours to travel 20 miles down a river and 3 hours to return upstream... (answered by stanbon)

The Rat River flows at a rate of 5 km/h. In order for a boat to travel 75 km upriver and... (answered by checkley77)