Maths Quiz on Boats and Streams

1. 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:
 4 km/hr
 5 km/hr
 6 km/hr
 10 km/hr
Maths Quiz on Boats and Streams

2.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:
 3 km/hr
 5 km/hr
 8 km/hr
 9 km/hr
Answer And Explanation
Answer: Option C
Explanation:
Note:Speed in still water = 1/2(11+5)= 8 km/hr
Maths Quiz on Boats and Streams

3.A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
 2 mph
 2.5 mph
 3 mph
 4 mph
Maths Quiz on Boats and Streams

4. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
 2.4 Km
 2.5 km
 3 km
 3.6 km
Maths Quiz on Boats and Streams

5.A boat covers a certain distance downstream in 1 hour, while it comes back in 1.5 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
 12 kmph
 13 kmph
 14 kmph
 15 kmph
Maths Quiz on Boats and Streams

6.A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
 40 minutes
 1 hour
 1 hour 15 minutes
 1 hour 30 minutes
Maths Quiz on Boats and Streams

7. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
 16 hours
 18 hours
 20 hours
 24 hours
Maths Quiz on Boats and Streams

8.A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:
 2:1
 3:1
 3:2
 4:3
Maths Quiz on Boats and Streams

9. A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:
 1 km/hr
 1.5 km/hr
 2 km/hr
 2.5 km/hr
Maths Quiz on Boats and Streams

10.A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
 2:1
 3:2
 8:3
 None of these
0 comments:
Post a Comment
Leave your comment but never use bad words otherwise you will be blocked.