Boat and Stream (Part-2)

Total Questions: 27

1. A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9 km/h and the speed of the current is 3.5 km/h, the distance between A and B is: (correct up to two decimal places) [SSC MTS 13/09/2023 (1st Shift)]

Correct Answer: (d) 11.46 km
Solution:

2. A ship goes at 18 km/h downstream and at 16 km/h upstream. What will be the speed of the ship in still water? [SSC CHSL 07/08/2023 (4th Shift)]

Correct Answer: (b) 17 km/h
Solution:

Speed of ship in still water = 18+16/2 = 17 km/h

3. Sanjana can row a boat at 9 km/h in still water. It takes her twice as long to row up a certain distance as to row down the same distance in the river. What is the rate of the stream (in km/h)? [SSC CHSL 10/08/2023 (2nd Shift)]

Correct Answer: (c) 3
Solution:

4. A man takes 15 minutes to row 16 km downstream, which is 25% less than the time he takes to row the same distance upstream. How many kilometers can the man row in an hour in still water? [SSC CGL 14/07/2023 (4th shift)]

Correct Answer: (a) 56
Solution:

5. The speed of boat down the stream is 125% of the speed in still water. If the boat takes 30 minutes to cover 20 km in still water, then how much time (in hours) will it take to cover 15 km upstream? [SSC CGL 19/07/2023 (3rd shift)]

Correct Answer: (b) 1/2
Solution:

6. The ratio of the speed of a motorboat to that of the current of water is 31:6. The motorboat starts from a point and covers a certain distance along the current in 4 h 10 min. Find the time taken by the motorboat to come back to its initial point. [SSC CGL 20/07/2023 (4th shift)]

Correct Answer: (d) 6 h 10 min
Solution:

7. A boat can cover 120 km upstream and back in a total of 30 hours, and 25 km upstream and 40 km downstream in a total of 7 hours. How much distance will the boat cover in 16 hours in still water? [SSC CGL 24/07/2023 (1st shift)]

Correct Answer: (a) 200 km
Solution:

8. A boat running upstream takes 10 hours to cover a certain distance, while it takes 7 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and that of the water current, respectively? [SSC CGL 25/07/2023 (3rd shift)]

Correct Answer: (d) 17 : 3
Solution:

9. Ajay can row his boat in still water, at a speed of 11 km/hr. If the speed of the stream is 7 km/hr, how long will it take to a distance of 54 km downstream? [SSC MTS 03/05/2023 (Afternoon)]

Correct Answer: (d) 3 hours
Solution:

Speed of downstream = 11+7 = 18 km/h
Required time = 58/18 = 3 hours

10. Two boats go downstream in a river at a speed of 35 km/hr and 25 km/hr. The speed of the stream is 4 km/hr. The distance between both boats initially is 60 km. In how much time will they meet if the boats are going downstream? [SSC MTS 15/05/2023 (Evening)]

Correct Answer: (c) 6 hours
Solution:

Relative speed of boats
= 35-25 = 10 km/h
Time taken to meet boats = 60/10 = 6 hours