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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:

  • Option 1)

    16 hours

  • Option 2)

    18 hours

  • Option 3)

    22  hours

  • Option 4)

    24 hours

  • Option 5)

    20 hours

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?

  • Option 1)

    12 kmph

  • Option 2)

    13 kmph

  • Option 3)

    17 kmph

  • Option 4)

    15 kmph

  • Option 5)

    14 kmph

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?

  • Option 1)

    2.4 km

  • Option 2)

    2.5 km

  • Option 3)

    4.2 km

  • Option 4)

    3.6 km

  • Option 5)

    3 km

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:

  • Option 1)

    2 mph

  • Option 2)

    2.5 mph

  • Option 3)

    3.5 mph

  • Option 4)

    4 mph

  • Option 5)

    3 mph

The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is:

  • Option 1)

    1.5 km

  • Option 2)

    1.8 km

  • Option 3)

    2.4 km 

  • Option 4)

    3.6 km

  • Option 5)

    1.2 km 

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:

  • Option 1)

    3 km/hr

  • Option 2)

    5 km/hr

  • Option 3)

    8 km/hr

  • Option 4)

    6 km/hr

  • Option 5)

    9 km/hr

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:

  • Option 1)

    4

  • Option 2)

    5

  • Option 3)

    6

  • Option 4)

    7

  • Option 5)

    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?

  • Option 1)

    2 : 1     

  • Option 2)

    4: 1

  • Option 3)

    8 : 3

  • Option 4)

    Cannot be determined

  • Option 5)

    3 : 2

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:

  • Option 1)

    8.5 km/hr

  • Option 2)

    6.5 km/hr

  • Option 3)

    10 km/hr

  • Option 4)

    12.5 km/hr

  • Option 5)

    9 km/hr

A boatman can row 3 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current

  • Option 1)

    \frac{1}{2}km/hr

  • Option 2)

    1 km/hr

  • Option 3)

    \frac{1}{3}km/hr

  • Option 4)

    2 km/hr

  • Option 5)

    \frac{2}{3}km/hr

 

Speed of a boat in standing water is 14 kmph and the speed of the stream is 1.2 kmph. A man rows to a place at a distance of 4864 km and comes back to the starting point. The total time taken by him is:

 

  • Option 1)

     

    250 hours

     

  • Option 2)

     

    350 hours

     

  • Option 3)

     

    1400 hours

     

  • Option 4)

     

    1010 hours

     

  • Option 5)

     

    700 hours

     

Upstream Speed = 14 - 1.2 => 12.8 Km/hr Downstream Speed = 14 + 1.2 => 15.2 Km/hr Total time taken = 4864/12.8 + 4864/15.2                            = 700 Hours

 

A man can row at 5 kmph in still water. If the velocity of current is 1 kmph& it takes him 1 hr to row to a place & come back, how far is the place

 

  • Option 1)

     

    4.2 km

     

  • Option 2)

     

    2.5 km

     

  • Option 3)

     

    3 km

     

  • Option 4)

     

    3.6 km

     

  • Option 5)

     

    2.4 km

     

Let's assume distance = D Upstream Speed = 5-1 => 4 Kmph Downstream Speed = 5 + 1 => 6 Kmph As per the given data, D/4 + D/6 = 1 D = 12/5 or 2.4 Km

 

A boat takes 19 hr to travel downstream from A to B & coming back to C, mid-way b/w A & B. If the velocity of stream is 4 kmph& speed of boat in still water is 14 kmph. What is the distance b/w A & B?

 

  • Option 1)

     

    160 km

     

  • Option 2)

     

    180 km

     

  • Option 3)

     

    220 km

     

  • Option 4)

     

    170 km

     

  • Option 5)

     

    120 km

     

If Total distance from A to B = D Then Distance between B to C = D/2 Upstream Speed = 14 - 4 => 10 Kmph Downstream Speed =14 + 4 => 18 Kmph According to Question, D/18 + D/20 = 19 19D/180 = 19 D = 180 Km

 

A man can row at 5 kmph in still water. If the velocity of current is 1 kmph& it takes him 1 hr to row to a place & come back, how far is the place

 

  • Option 1)

     

    2.4 km

     

  • Option 2)

     

    2.5 km 

     

  • Option 3)

     

    4.2 km

     

  • Option 4)

     

    3.6 km

     

  • Option 5)

     

    3 km

     

Let's assume distance = D Upstream Speed = 5- 1 => 4 Kmph Downstream Speed = 5 + 1 => 6 Kmph As per the question, D/4 + D /6 => 1 D = 12/5 => 2.4 Km 

 

If a boat goes 7km upstream in 42 min & speed of stream is 3kmph. Then what is the speed of boat in still water?

 

  • Option 1)

     

    4.2 kmph

     

  • Option 2)

     

    9 kmph

     

  • Option 3)

     

    13 kmph

     

  • Option 4)

     

    3.5 kmph

     

  • Option 5)

     

    21 kmph

     

Upstream Speed = 7 x 60/42 => 10 Kmph Speed of Stream = 3 Kmph Speed Of Boat = 10 + 3 => 13 Kmph

 

A boat running upstream takes 8 hr 48 min to cover a certain distance, while it takes 4 hrs to cover the same distance running downstream. What is the ratio b/w speed of boat & speed of water current?

 

  • Option 1)

     

    2:1       

     

  • Option 2)

     

    4:1

     

  • Option 3)

     

    8:3

     

  • Option 4)

     

    None

     

  • Option 5)

     

    3:2

     

Upstream Time = 8 hours 48 min or 44/5 hours Downstream Time = 4 hours The ratio of Upstream Speed & Downstream Speed = 44/5: 4 or 11: 5 The only option satisfying the above ratio is an option (C). The answer is an option (C)   

 

A man takes twice as long to row a distance against the stream as to row the same distance in favour of stream. The ratio of speed of boat in still water and the steam is:

 

  • Option 1)

     

    2:1

     

  • Option 2)

     

    3:1

     

  • Option 3)

     

    5:2

     

  • Option 4)

     

    3:2

     

  • Option 5)

     

    2:3

     

                Upstream        Downstream Time           2                          1 Speed        1                           2           (Distance is same so time will be inversely proportional to speed) The only option which is satisfying the ratio is 3: 1. So, Option (B) is the answer.

 

A boatman goes 2 km against the current in 1 hr & goes 1 km along the current in 10 min. How long will it take to go 5km in still water?

 

  • Option 1)

     

    40 min  

     

  • Option 2)

     

    60 min  

     

  • Option 3)

     

    75 min

     

  • Option 4)

     

    30 min 

     

  • Option 5)

     

    90 min

     

Upstream Speed = 2/1 => 2 Kmph Downstream Speed = 1 x 6 => 6 Kmph Speed Of Boat = (6+2)/2 => 4 Kmph Time taken to coover 5 Km = 5/4 x 60 => 75 minutes

 

A boat running downstream covers a distance of 16km in 2 hr & upstream in 4 hr. What is the speed of boat in still water

 

  • Option 1)

     

    5 kmph

     

  • Option 2)

     

    6 kmph

     

  • Option 3)

     

    8 kmph

     

  • Option 4)

     

    10 kmph

     

  • Option 5)

     

    4 kmph

     

Upstream Speed = 16/4 => 4 Downstream Speed = 16/2 => 8 Speed Of Boat = (8+4)/2 => 6 Kmph

 

A man rows downstream 32km & 14km upstream. If he takes 6 hr to cover each distance. The the velocity of current is:

 

  • Option 1)

     

    2.5 kmph

     

  • Option 2)

     

    1 kmph

     

  • Option 3)

     

    1.5 kmph

     

  • Option 4)

     

    2 kmph

     

  • Option 5)

     

    0.5 kmph

     

Upstream Speed = 14/6 Downstream Speed = 32/6
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