- A2:30 p.m.
- B2:00 p.m.
- C3:00 p.m.
- D2:20 p.m.
Step-by-Step Solution
They separate at 13 + 15 = 28 km/h (the current cancels: 16 + 12). 70 ÷ 28 = 2.5 h after noon, i.e. 2:30 p.m.
Answer: A) 2:30 p.m.
A police boat (16 km/h in still water) heads upstream and a ferry (12 km/h in still water) heads downstream, both leaving the same jetty at noon. The river flows at 3 km/h. When will they be 70 km apart?
Competition practiceBoats & Streams
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 Boats & Streams practice questions
More Boats & Streams practice
Launch X (13 km/h in still water) leaves Patna ghat going upstream. Thirty minutes later…In the figure, the boat leaves A at 7 a.m., reaches B, waits there for 30 minutes, then…A steamer's still-water speed is 25 km/h. It goes 90 km upstream in 4.5 hours. How long…A motorboat goes 30 km downstream and comes back in a total of 4.5 hours. The stream…A boat goes 24 km upstream in 6 hours and 20 km downstream in 2.5 hours. In how many…