- A10
- B9
- C12
- D3
Step-by-Step Solution
Downstream speed = 30/2 = 15 km/h, upstream speed = 18/2 = 9 km/h. Still-water speed = (15 + 9)/2 = 12 km/h.
Answer: C) 12
A man rows 30 km downstream in 2 hours and 18 km upstream in 2 hours. Find the speed of the boat in still water (in km/h).
Competition practiceSpeed, Time & Distance
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Speed, Time & Distance practice questions
More Speed, Time & Distance practice
An express train 250 m long is travelling at 90 km/h. How long, in seconds, will it take…A man can row at 6 km/h in still water. He takes twice as long to row a certain distance…Going downstream, a ferry covers 42 km in 3 hours; coming back upstream, the same 42 km…Running at 72 km/h, a 220 m long express clears a platform completely in 25 seconds.…A boat covers 36 km downstream in 3 hours and 24 km upstream in 3 hours. Find the speed…