A boat travels 12 km downstream and returns. If still-water speed is 5 km/h…
2025
A boat travels 12 km downstream and returns. If still-water speed is 5 km/h and stream speed is 1 km/h,
total time taken is:
- A.
4 hours
- B.
5 hours
- C.
6 hours
- D.
7 hours
Attempted by 19 students.
Show answer & explanation
Correct answer: B
Downstream speed is 5 + 1 = 6 km/h and upstream speed is 5 - 1 = 4 km/h. Total time is 12/6 + 12/4 = 2 + 3 = 5 hours.