Multiple choice

Going downstream a boat takes 45 minutes to cover a distance of 15 Kms while returning it took 1 hour and 15 minutes. Find the speed of boat.

  1. 15 Kmph

  2. 12 Kmph

  3. 18 Kmph

  4. 16 Kmph

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Downstream: (b+s)×45/60=15. Upstream: (b−s)×75/60=15. Solving gives b+s=20 and b−s=12. Adding: 2b=32, so b=16 km/h. This matches option D.