Hello, Zac!

You know: .

Water in the murray flows at 4 km/hr.

If a boat takes 3 hours to complete 32 km round trip,

what is the boat's relative speed to the water?

so far i have found that when going upstream, the equation is (x + 4)

and when going downstream the equation is (x - 4) . . . . These are reversed

Let = boat's speed.

Going upstream, its speed issmaller: .

Going downstream, its speed isgreater: .

It went upstream km at km/hr.

. . This took: . hours.

It went downstream km at km/hr.

. . This took: . hours.

The total trip took 3 hours: .