Two boats go downstream from point X to Y. The faster boat covers the distance from X to Y, 1.5 times as fast as slower boat. It is known that for every hour slower boat lags behinds the faster boat by 8 km. however, if they go upstream, then the faster boat covers the distance from Y to X in half the time as the slower boat. Find the speed of the faster boat in still water
Q:Two boats go downstream from point X to Y. The faster boat covers the distance from X to Y, 1.5 times as fast as slower boat. It is known that for every hour slower boat lags behinds the faster boat by 8 km. however, if they go upstream, then the faster boat covers the distance from Y to X in half the time as the slower boat. Find the speed of the faster boat in still water
- A: 10
- B: 24
- C: 20
- D: 18
Correct Answer: C
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Q: The steamer going upstream would cover the distance between Town A and Town B in 4 hours and 30 minutes. The same steamer going downstream would cover the distance between the towns in 3 hours. How long would it take a raft moving at the speed of the current to float from B to A?
- A: 10 hours
- B: 12 hours
- C: 15 hours
- D: 18 hours
Correct Answer: D
Q: A boat travelling upstream has to reach its destination by 03:00 p.m. The boat started at 12 noon and was travelling with a speed of 10 km/hr in still water to cover one-fourth of the ni distance, after which the river started flowing 20% faster against the boat. What should be the are percentage increase in the still water speed of the boat so as to reach just in time? Given that the speed of flow is 5 km/hr and total distance to be covered is 20 km.
- A: 10%
- B: 20%
- C: 35%
- D: 15%
Correct Answer: C
Q: A boat can go 80 Km downstream and 72 Km upstream in 14 hours. It can go 144 Km downstream and 88 Km upstream in 20 hours. If the speed of the boat in still water is increased by 25% and speed of the stream is increased by 1 Km/h, Find the sum of downstream distance travelled by the boat in 4 hours and upstream distance travelled by the boat in 6 hours.
- A: 140 km
- B: 240 km
- C: 180 km
- D: 160 km
Correct Answer: A
Q: The speed of boat A and B in still water is ‘3x’ km/hr and ‘7y’ km/hr respectively whereas the speed of stream A and B is ‘y’ km/hr and ‘2x’ km/hr respectively. Boat A can cover 105 km in 3 hours while travelling in stream A downstream. Boat B can cover 90 km in 6 hours while travelling in stream B upstream. What would be boat A’s speed while travelling in
- A: 25 km/hr
- B: 5 km/hr
- C: 15 km/hr
Correct Answer: A
Q: Time taken by boat to travel a distance of 180 km upstream is 30 minutes more than the time taken by boat to travel the same distance downstream, and the time taken to travel a distance of 160 km downstream is equal to the time taken to travel 144 km upstream. Find the speed
- A: 38 km/hr
- B: 42 km/hr
- C: 40 km/hr
Correct Answer: C
Q: A boatman rows ‘y’ km downstream and ‘y/2’ km upstream. A fish whose speed is 6 km/hr in I still water moves against the stream and covers 3 km in 1 hour. If the speed of boatman in still water is 15 km/hr and the total time taken by the boatman to cover the whole distance is
- A: 42 km
- B: 36 km
- C: 35 km
Correct Answer: B
Q: City A to city B is a downstream journey on a stream which flows at a speed of 5km/hr. Boats P and Q run a shuttle service between the two cities that are 300 kms apart. Boat P, which starts from City A has a still-water speed of 25km/hr, while boat Q, which starts from city B at the same time has a still-water speed of 15km/hr. When will the two boats meet for the first time? When and where will they meet for the second time?
- A: 10
- B: 24
- C: 20
- D: 18
Correct Answer: C
Q: Awas travelling in a boat, suddenly wind starts blowing and blows her hat and started floating back downstream. the boat continued to travel upstream for 12 more minutes before she realized that her hat had fallen off. she turned back downstream and she caught her hat as soon as she reached the starting point. if her hat flew off exactly 3 km from where she started. what is the speed of the water?
- A: 20
- B: 15
- C: 5
- D: 35
Correct Answer: C
Q: A man can row at 4.5 kmph in still water. It takes him twice as long to row up as to row down
- A: 2
- B: 1.5
- C: 5
Correct Answer: B
Q: Speed of a boat is 25 km per hour in still water and the speed of the stream is 5 km If the boat takes 15 hrs to go to a place and come back, the distance of the place is
- A: 180 km
- B: 160 km
- C: 164 km
- D: 220 km
Correct Answer: A
Q: A boat running at the speed of 30 km/hr downstream covers a distance of 5 km in 10 minutes. The same boat while running upstream at the same speed covers the same distance in 12 minutes. What is the speed of the current?
- A: 2.5 km/hr
- B: 4 km/hr
- C: 3.2 km/hr
- D: 1.5 km/hr
Correct Answer: A
Q: Two boats A and B start towards each other from two places, 150 km apart. Speed of the boat A and B in still water are 16 km/hr and 14 km/hr respectively. If A proceeds down and B up the stream, they will meet after
- A: 4.5 hours
- B: 4 hours
- C: 5 hours
- D: 6 hours
Correct Answer: C
Q: If the ratio of speed of boat in downstream and speed of stream is 9: 1, speed of current is 3 km per hr, What would be the distance travelled in upstream by the boat in 5 hours?
- A: 90 km
- B: 97 km
- C: 115 km
- D: 105km
Correct Answer: B
Q: Speed of a boat in standing water is 9kmph and the speed of the stream is 1.5 kmph. A man s to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is –
- A: 12
- B: 24
- C: 16
- D: 18
Correct Answer: B