Afisherman traveled in a boat from point n upstream. after having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving n, he was brought back to n by the current. knowing that the speed of the boat in still water is 9 km/hour, find the speed of the river’s current.

upstream means going in opposite direction of river's current

downstream means going in same direction of river's current

Let the speed of river's current be x km/hour

so net speed of boat in upstream = (9-x) km/hour

net speed of boat in downstream = (9+x) km/hour

total time taken = 2 hours 40 minutes = 8/3 hours

total time taken = time in upstream + time in downstream

( time = distance / speed)

8/3 = 6/(9-x) + 6/(9+x)

solving for x

x = 6.36 km/hour

so speed of river's current = 6.36 km/hour

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

answer: its c because when it has a magnet next to it it will move away from the mixture. hope this

step-by-step explanation: