Boats And Streams(Quantitative Aptitude ) Questions and answers for exam Preparation

Quantitative Aptitude

BOATS AND STREAMS MCQs

Total Questions : 948 | Page 94 of 95 pages

Question 931. A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water?

60 kmph
10 kmph
30 kmph
5 kmph

Discuss Question

Answer: Option C. -> 30 kmph
US = 25
DS = 35
M = (35 + 25)/2 = 30

Question 932. A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man’s rate is________?

1 kmph
5 kmph
8 kmph
3 kmph

Discuss Question

Answer: Option A. -> 1 kmph
DS = 6
US = 4
S = ?
S = (6 – 4)/2 = 1 KMPH

Question 933. If a man rows at the rate of 5 kmph in still water and his rate against the current is 3.5 kmph. then the man’s rate along the current is__________?

4.25 kmph
6 kmph
6.5 kmph
8.5 kmph

Discuss Question

Answer: Option C. -> 6.5 kmph
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 934. 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 hr 15 min
1 hr 30 min

Discuss Question

Answer: Option C. -> 1 hr 15 min
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 935. A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:_________?

Discuss Question

Answer: Option D. -> 5
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 936. 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

Discuss Question

Answer: Option D. -> 24 hours
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 937. 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

Discuss Question

Answer: Option B. -> 3 : 1
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 938. A man can row 9 1/3 km/hr in still water and he finds that is thrice as much time to row u p than as to row down the same distance in river. The speed of the current is:________?

3 1/3 km/hr
3 1/9 km/hr
1 ¼ km/hr
4 2/3 km/hr

Discuss Question

Answer: Option D. -> 4 2/3 km/hr
LET SPEED UPSTREAM = X KM/HR
SPEED DOWNSTREAM = 3X KM/HR
SPEED IN STILL WATER = ½ (X+3X) KM/HR = 2X KM/HR
SPEED OF CURRENT = ½ (3X-X) KM/HR = X KM/HR
2X = 28/3 OR X = 14/3 = 4 2/3 KM/HR

Question 939. 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 he take to go 5km in stationery water?

40 Minutes
1 Hour
1 hr 15 Min
1 Hr 30 Min

Discuss Question

Answer: Option C. -> 1 hr 15 Min
SPEED UPSTREAM = 2KM/HR.
SPEED DOWNSTREAM = 6 KM/HR
SPEED IN STATIONARY WATER = ½ (6 + 2) KM/HR = 4 KM/HR
TIME IS TAKEN TO COVER 5 KM IN STATIONARY WATER
= (1/4 X 5) 1 HR 15 MIN

Question 940. 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 9km/hr and the speed of the current is 3km/hr, the distance A and B is:_______?

4km
6 km
8 km
12 km

Discuss Question

Answer: Option D. -> 12 km
SPEED DOWNSTREAM = (9+3) KM/HR = 12KM/HR
SPEED UPSTREAM = (9-3) KM/HR = 6 KM/HR
DISTANCE AB = X KM
X/6 + X/12 = 3
=> 2X + X = 36
=> X= 12