If a boat takes 2 hours to go 26 km down river and 6 hours to return, how fast i

Question

If a boat takes 2 hours to go 26 km down river and 6 hours to return, how fast is the river going in km/hr. When I tried answering the question and got 4.33 thinking

V(total1)=V(boat) + V(river) V(total2)= V(boat)-V(river) and say V(total1) is down river and V(total2) is up river V(boat) should remain constant even though the total velocity that will be travelled back will seem less because we are fighting the river velocity. Am I right or wrong i know this is simple I am just having a brain fart.
V(total1)=V(boat) + V(river) V(total2)= V(boat)-V(river) and say V(total1) is down river and V(total2) is up river V(boat) should remain constant even though the total velocity that will be travelled back will seem less because we are fighting the river velocity. Am I right or wrong i know this is simple I am just having a brain fart.

Explanation / Answer

Yes your approach is flawless and answer is also correct.

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