Q. 8)
A boat takes 2 hours to travel downstream a river from port $A$ to port $B$, and 3 hours to return to port A. Another boat takes a total of 6 hours to travel from port $B$ to port $A$ and return to port $B$. If the speeds of the boats and the river are constant, then the time, in hours, taken by the slower boat to travel from port $A$ to port $B$ is
- $3(\sqrt{5}-1)$
- $3(3+\sqrt{5})$
- $3(3-\sqrt{5})$
- $12(\sqrt{5}-2)$