A boat goes 96 km upstream in 8 hours and covers the same distance downstream in 6 hours. The next day boat starts from A, goes downstream for 1 hour, then upstream for 1 hour, and repeats 4 more times (5 upstream and 5 downstream). Then the boat would be
- A22.5 km downstream of A
- B15 km downstream of A
- C12.5 km downstream of A
- D20 km downstream of A