Boat and Stream MCQs for Competitive Examination
Solve the following problems.
Q. 21
A boat can travel 60 km in 3 hours while going downstream. It can travel 90 km in 5 hours while going upstream. What is the ratio of the speed of boat in still water to the speed of the stream?
(A) 6 : 1
(B) 4 : 1
(C) 19 : 1
(D) 10 : 9
Answer: (C) 19 : 1
Explanation: N/A
Q. 22
The speed of boat in still water is 6 km/hour. Time taken by the boat to cover a certain distance upstream in 3 hours more than the time taken to cover the same distance downstream. If the speed of the stream is 2 km/h, then what is the total distance, upstream and downstream, covered by the boat?
(A) 72 km
(B) 24 km
(C) 48 km
(D) 36 km
Answer: (C) 48 km
Explanation: N/A
Q. 23
A boat can go 30 km downstream and 24 km upstream in 2 hours 27 minutes also. It can go 10 km downstream and 4 km upstream in 37 minutes. What is the speed of the boat upstream (in km/hour)?
(A) 24
(B) 18
(C) 22
(D) 20
Answer: (D) 20
Explanation: N/A
Q. 24
If a boat goes upstream at a speed of 21 km/hour and comes back the same distance at 28 km/hour. What is the average speed (in km/hour) for the total journey?
(A) 24.5
(B) 24
(C) 25
(D) 25.4
Answer: (B) 24
Explanation: N/A
Q. 25
A boat moves downstream at the rate of 1 km in 7(1/2) minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water?
(A) 3.5 km/hour
(B) 6.5 km/hour
(C) 4 km/hour
(D) 8 km/hour
Answer: (B) 6.5 km/hour
Explanation: N/A
Q. 26
A man rows upstream 36 km and downstream 48 km, he takes 6 hours each time. The speed of the current is
(A) 0.5 km/h
(B) 2 km/h
(C) 1 km/h
(D) 1.5 km/h
Answer: (C) 1 km/h
Explanation: N/A
Q. 27
A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is
(A) 2 : 1
(B) 1 : 2
(C) 4 : 3
(D) 3 : 1
Answer: (D) 3 : 1
Explanation: N/A
Q. 28
A boat covers 12 km upstream and 18 km downstream in 3 hours, while it covers 36 km upstream and 24 km downstream in 6(1/2) hours. What is the speed of the current?
(A) 1.5 km/hr
(B) 1 km/hr
(C) 2 km/hr
(D) 2.5 km/hr
Answer: (C) 2 km/hr
Explanation: N/A
Q. 29
A boat goes 4 km upstream and 4 km downstream in 1 hour. The same boat goes 5 km downstream and 3 km upstream in 55 minutes. What is the speed of boat in still water
(A) 6.5 km/h
(B) 7.75 km/h
(C) 9 km/h
(D) 10.5 km/h
Answer: (C) 9 km/h
Explanation: N/A
Q. 30
A boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed for the total journey?
(A) 45 km/h
(B) 35 km/h
(C) 40 km/h
(D) 50 km/h
Answer: (C) 40 km/h
Explanation: N/A
Q. 31
A boat moves downstream at the rate of 8 km per hour and upstream at 4 km per hour. The speed of the boat in still waters is
(A) 4.5 km/h
(B) 5 km/h
(C) 6 km/h
(D) 6.4 km/h
Answer: (C) 6 km/h
Explanation: N/A
Q. 32
A boat travels 60 km downstream and 20 km upstream in 4 hours. The same boat travels 40 km downstream and 40 km upstream in 6 hours. What is the speed of the stream?
(A) 24 km/h
(B) 16 km/h
(C) 18 km/h
(D) 20 km/h
Answer: (B) 16 km/h
Explanation: N/A
Q. 33
A swimmer swims from a point A against a current for 5 minutes and then swims backwards in favour of the current for the next 5 minutes and comes to the point B. If AB is 100 metres, then the speed of the current is
(A) 0.4 km/h
(B) 0.2 km/h
(C) 1 km/h
(D) 0.6 km/h
Answer: (D) 0.6 km/h
Explanation: N/A
Q. 34
A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/h, then the speed of the boat in still water is
(A) 12 km/h
(B) 9 km/h
(C) 8 km/h
(D) 6 km/h
Answer: (B) 9 km/h
Explanation: N/A
Q. 35
A man rows a boat 18 km in 4 hour downstream and returns upstream in 12 hours. The speed of the stream is
(A) 2 km/h
(B) 1.5 km/h
(C) 1 km/h
(D) 1.75 km/h
Answer: (B) 1.5 km/h
Explanation: N/A
Q. 36
A man can row at a speed of 4(1/2) km/h in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream is
(A) 2 km/h
(B) 1.5 km/h
(C) 2.5 km/h
(D) 1 km/h
Answer: (B) 1.5 km/h
Explanation: N/A
Q. 37
The speed of a motorboat is that of the current of water as 36 : 5. The boat goes along with the current in 5 hours 10 minutes. It will come back in
(A) 5 hours 50 minutes
(B) 6 hours
(C) 6 hours 50 minutes
(D) 6 hours 40 minutes
Answer: (C) 6 hours 50 minutes
Explanation: N/A
Q. 38
Two boats A and B start towards each other from two places, 108 km apart. Speed of the boat A and B in still water are 12 km/h and 15 km/h respectively. If A proceeds down and B up the stream, they will meet after
(A) 4.5 hours
(B) 5.4 hours
(C) 6 hours
(D) 4 hours
Answer: (D) 4 hours
Explanation: N/A
Q. 39
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr in the same direction, then the time taken by boat to go 63 km in opposite direction is
(A) 9 hours
(B) 4 hours
(C) 7 hours
(D) 3(9/17) hours
Answer: (C) 7 hours
Explanation: N/A
Q. 40
A boat goes 6 km an hour in still water, but takes thrice as much time in going the same distance against the current. The speed of the current is
(A) 4 km/h
(B) 5 km/h
(C) 3 km/h
(D) 2 km/h
Answer: (A) 4 km/h
Explanation: Speed of the current = x km/h(suppose)
6/(6 – x) = 3
hence x = 4 km/h