- A4
- B3
- C6
- D5
Step-by-Step Solution
Upstream time = 2 × downstream time means downstream speed = 2 × upstream speed: 15 + s = 2(15 − s) ⇒ 3s = 15 ⇒ s = 5 km/h.
Answer: D) 5
A boat can row 15 km/h in still water. If it takes twice as long to row a certain distance upstream as to row the same distance downstream, find the speed of the stream. (answer 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
A 160 m long passenger train runs at 54 km/h. How many seconds does it take to clear a…A boat goes 39 km downstream in 3 hours and 14 km upstream in 2 hours. Find its speed in…A boat covers 20 km downstream in 2 hours and the same 20 km upstream in 4 hours. What…In still water Rahul's boat moves at 10 km/h. The stream flows at 2 km/h, and a trip to…Two trains, 120 m and 180 m long, are running in opposite directions at 40 km/h and 50…