- A6
- B7.5
- C8
- D5
Step-by-Step Solution
Downstream = 10 km/h, upstream = 5 km/h; still water speed = (10 + 5)/2 = 7.5 km/h.
Answer: B) 7.5
A boat covers 20 km downstream in 2 hours and the same 20 km upstream in 4 hours. What is the speed of the boat in still water?
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
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…Meenal cycles the first half of a route at 12 km/h and the second half at 18 km/h. What…A man can row 8 km/hr in still water. The river flows at 2 km/hr. If it takes him 3…The Shatabdi's 225 m long rake goes past a lamp post on the platform edge in exactly 9…