EASY
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A boat can cover 100 km upstream and 90 km downstream in 6 hours. The downstream speed of the boat is 80% more than the upstream speed. Find the time taken by boat to travel 150 km upstream with a stream speed double the normal stream speed

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Important Questions on Ratio, Proportion and Variation

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
In a stream running at 3 km/h, a motorboat goes 12 km upstream and back to the starting point in 60 min. Find the speed of the motorboat in still water.(in km/h)
HARD
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A man can row 24 km in upstream and 54 km in downstream in 6 hours. He can also row 36 km in upstream and 48 km in downstream in 8 hours. What is the speed of the man in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat can go 3.6km and 5.4km down stream in 54min, while it can go 5.4km upstream and 3.6km down stream in 58.5min. The time (in minutes) taken by the boat in going 10km down stream is:
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat goes 27 km upstream and 33 km downstream in 6 hours. In the same time, it can go 36 km upstream and 22 km downstream. How much time will it take to go 36 km upstream and 44 km downstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
The speed of boat A is 2 km/h less than the speed of the boat B. The time taken by boat A to travel a distance of 20 km downstream is 30 min more than time taken by B to travel the same distance downstream. If the speed of the current is one-third of the speed of the boat A, what is the speed of boat B?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
Sunil can row a boat 20 km upstream in 1 hour 15 min. If the speed of the current of the river is 2 km/h, then how much time will he take to row the boat 30 km downstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat can go 3km upstream and 5km downstream in 55 min. It can also go 4km upstream and 9km downstream in 1hr 25min. In how much time(in hours) it will go 43.2km downstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat travels 16 km upstream in 4 hours and 12 km downstream in 6 hours. What is the speed (in km/hr) of boat in still water?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems

Ratio between speed of boat in still water to speed of stream is 8:1.If 67.5 kms is travelled downstream in 2.5 hours then find the difference between speed of boat in still water to speed of stream?

EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems

Quantity 1: Ratio between the speed of the boat in still water to the speed of the stream is 2:1. Total time taken by a man to cover distance of 72 km in upstream and comeback is 32 hours. Find downstream speed.

Quantity 2: 9 9 km/h.

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat goes 30 km upstream in 3 hours and downstream in 1 hour. How much time (in hours) will this boat take to cover 60 km in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
The ratio of speed of boat in downstream and speed of boat in upstream is 9:7, if speed of current is 3 km/h, then find distance travelled by boat in upstream in 5 hours.
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems

A boat in still water takes 15 hours to reach its destination and come back from there. In the same river, it takes 16 hours for the same journey where there is a current in the water. The difference between the speed of the boat and the river current is 15 km/hr. Find out the speed of the river?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
X, Y are two points in a river. Points P and Q divide the straight line XY into three equal parts. The river flows along XY and the time is taken by a boat to row from X to Q and from Y to Q are in the ratio 4 : 5. Find the ratio of the speed of the boat downstream to that of the river current.
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A sailor takes 12 hours to cover a distance of 75 kms against the current, while he takes 7.5 hours to cover the same distance in the direction of the current. What is the speed of the current? 
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
The speed of a boat in still water is 20 km/hr. It covers a distance of 40 km upstream in 8 hours. What is the speed (in km/hr) of the stream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems

Speed of a boat along with the current and against the current are 12 km/hr and 6 km/hr respectively. What is the speed of the boat (in km/hr) in still water?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
The speed of the boat in still water is 500% more than the speed of the current. What is the respective ratio between the speed of the boat in downstream and speed of the boat in upstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat can travel 14.4 km downstream in 32 min. If the speed of the current is 3 km/h, how much time the boat will take to travel 84 km upstream?
HARD
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Boats and Streams Problems
A boat can travel 12.6 km downstream in 35 minutes. If the speed of the water current is one - fourth the speed of the boat in still water, what distance the boat can travel upstream in 28 minutes?