## Aptitude Boats and Streams Test Paper 311) The velocity of a boat in still water is 9 km/hr, and the speed of the stream is 2.5 km/hr. How much time will the boat take to go 9.1 km against the stream? - 1 hr. 20min
- 2hr. 40min
- 1hr. 24min
- 2hr. 48min
ATQ, Speed of boat in still water (S
The speed of boat upstream = speed of boat - the speed of the stream The speed of upstream = 9-2.5 = 6.5km/hr Now, time= Distance/speed Time = 9.1/6.5, or 7/5 Or, time = 1[2/5] Or, 1hr + (2/5)*60 = 1hr + 24minutes 12) A man covers a distance of 36 km in 6 hours downstream and a distance of 40 km upstream in 8 hours. What is his speed in still water? - 5.5km/hr
- 8km/hr
- 7km/hr
- None of these
Upstream speed = 40/8 = 5kmph Or, the speed of man = [½][6+5] =5.5kmph 13) A boat travels upstream from Q to P and downstream from P to Q in 3 hours. If the distance between P to Q is 4km and the speed of the stream is 1kmph, then what is the velocity of the boat in still water? - 3kmph
- 4kmph
- 5kmph
- 7.2kmph
Let the velocity or speed of the boat in still water is x km/hr.
So, [4/ (x+1)] + [4/ (x-1)] = 3 hrs.
Or, [4 (x+1+x-1)]/ [(x+1) (x-1)] = 3 14) The speed of the stream is 5km/hr. A boat goes 10 km upstream and returns back to the starting point in 50 minutes. Find the velocity of the boat in still water. - 20km/hr
- 25km/hr
- 30km/hr
- 50km/hr
Let the speed or velocity of the boat in still water is x km/hr
So, [10/ (x+5)] + [10/ (x-5)] = (50/60) hrs.
Or, [10 (x-5+x+5)]/ [(x+5) (x-5)] = 5/6 15) A boat travels from A to B along the stream and from B to A against the stream in 3 hours. If the velocity of the boat in still water is 4 km/hr, what is the distance between A and B? - 8 km
- 10 km
- 12 km
- Data insufficient
Let the distance between A and B is x km
Time = distance/speed Let the speed of stream = y So, (x/(4+y))+ (x/(4-y)) = 3hr. Aptitude Boats and Streams Test Paper 1 Aptitude Boats and Streams Test Paper 2 Aptitude Boats and Streams Test Paper 4 Boats and Streams Concepts Next TopicBoats and Streams Aptitude Test Paper 4 |