Boats and streams - Aptitude 2 MCQ Questions and Solutions with pdf

21 . A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

14 km/hr
10 km/hr
30 km/hr
20.5 km/hr

Answer - [ 10 km/hr ]

22 . A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:

Answer - [ 5 ]

23 . In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

5 km/hr
8 km/hr
6 km/hr
10 km/hr

Answer - [ 8 km/hr ]

24 . A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?

12 km/hr
15 km/hr
13 km/hr
20 km/hr

Answer - [ 15 km/hr ]

25. A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:

4 km/hr
5 km/hr
6 km/hr
8 km/hr

Answer - [ 5 km/hr ]

26 . Find the ratio of swimming speed of Raj in still water to speed of river, if ratio of time taken to go 10km upstream to time taken to go 10km downstream is 11:5?

6:7
8:3
9:2
2:4

Answer - [ 8:3 ]

27. Guddi’s swimming speed in still water to the speed of river is 7:1. She swims 4.2 km up the river in just 14 min. How much time will Guddi take to swim 18.4 km down the river?

45 min
46 min
59 min
20 min

Answer - [ 46 min ]

28. In 10 hours Mayur rows 30 kms upstream and 44 kms downstream. Also he travels 40 kms upstream and 55 kms downstream in 13 hours. What is speed of the boat in still water?

5 km/hr
7 km/hr
10 km/hr
8 km/hr

Answer - [ 8 km/hr ]

29 . 3 towns P, Q and R are located at the bank of a stream. Distance of Q from P and R is same. Jeet rows from P to Q and Q to P in total 10 hours. Jeet also requires 4 hours to row from P to R. If the stream flows at a consistent rate what will be the ratio of Jeet’s speed in still water and speed of stream?

7:3
5:3
6:7
3:3

Answer - [ 5:3 ]

30 . A boats man can row in still water at speed of 7 km/hr. It takes 6 hours more to travel the same distance in upstream than in downstream if the speed of the river is 3 km/hr. what is the distance between the two destinations?