Boats and Streams - Quantitative Aptitude (MCQ) questions

1)   3 towns P, Q and R are located at the bank of a stream. Distance of Q from P and R is same. Jeet rows from P to Q and Q to P in total 10 hours. Jeet also requires 4 hours to row from P to R. If the stream flows at a consistent rate what will be the ratio of Jeet’s speed in still water and speed of stream?
- Published on 17 Mar 17

a. 6:7
b. 5:3
c. 5:2
d. 7:6
Answer  Explanation 

ANSWER: 5:3

Explanation:
boats and streams


2)   What will be the boat's speed in still water and speed of river, if the boat takes 12 hours to row 48 km upstream and 8 hours to row the same distance downstream?
- Published on 17 Mar 17

a. Boat = 6 km/hr; River = 4 km/hr
b. Boat = 12 km/hr; River = 6 km/hr
c. Boat = 5 km/hr; River = 1 km/hr
d. Boat = 4 km/hr; River = 3 km/hr
e. Boat = 4 km/hr; River = 3 km/hr
Answer  Explanation 

ANSWER: Boat = 5 km/hr; River = 1 km/hr

Explanation:
boats and streams


3)   Raj swims for 6 ½ hours while going 24 km downstream and 36 km upstream. But he takes just 6 hours to swim 36 km downstream and 24 km upstream. At what rate is the river flowing?
- Published on 15 Mar 17

a. 6 km/hr
b. 3 km/hr
c. 2 km/hr
d. 4 km/hr
Answer  Explanation 

ANSWER: 2 km/hr

Explanation:
boats and streams


4)   Vijay rows a boat 80 km along the stream in 1 hour 20 minutes. Given that his rowing speed in still water is 45 km/hr, in how much time will he cover the same distance against the stream?
- Published on 15 Mar 17

a. 4 hours
b. 3 hours 10 minutes
c. 2 hours 40 minutes
d. 2 hours 30 minutes
Answer  Explanation 

ANSWER: 2 hours 40 minutes

Explanation:
boats and streams


5)   What will be Raj’s speed in still water as well as speed of the river, if he can go downstream at 18 km/hr and upstream at 10 km/hr?
- Published on 15 Mar 17

a. Raj = 10 km/hr ; River = 5 km/hr
b. Raj = 14 km/hr ; River = 4 km/hr
c. Raj = 28 km/hr ; River = 8 km/hr
d. Raj = 8 km/hr ; River = 28 km/hr
Answer  Explanation 

ANSWER: Raj = 14 km/hr ; River = 4 km/hr

Explanation:
boats and streams


6)   What is speed of Ram in still water and speed of river, if Ram covers 20 km in 1 hour swimming downstream and covers the same distance in 2 h swimming upstream?
- Published on 15 Mar 17

a. River = 6 km/hr ; Ram = 14 km/hr
b. River = 8 km/hr ; Ram = 12 km/hr
c. River = 4 km/hr ; Ram = 16 km/hr
d. River = 5 km/hr ; Ram = 15 km/hr
Answer  Explanation 

ANSWER: River = 5 km/hr ; Ram = 15 km/hr

Explanation:
boats and streams


7)   Ajay takes 4 hours more while swimming upstream than downstream. His speed in still water is 10 km/hr. The speed of stream is 2 km/hr. What is the distance?
- Published on 15 Mar 17

a. 96 km
b. 20 km
c. 80 km
d. 72 km
Answer  Explanation 

ANSWER: 96 km

Explanation:
boats and streams


8)   An ocean current flows at a rate of 1.5 km/hr. A shark can swim in still water at the rate 4.5 km/hr. What is the average speed for the entire distance travelled, if the shark swims from India to Australia and comes back?
- Published on 10 Mar 17

a. 3.5 km/hr
b. 4 km/hr
c. 3 km/hr
d. 6 km/hr
Answer  Explanation 

ANSWER: 4 km/hr

Explanation:
boats and streams


9)   A river flows at speed of 6 km/hr. Surendra swims downstream for some distance in just 12 hours. But he takes 18 hours to return the same distance upstream. How fast is Surendra in still water?
- Published on 10 Mar 17

a. 30 km/hr
b. 24 km/hr
c. 12 km/hr
d. 36 km/hr
Answer  Explanation 

ANSWER: 30 km/hr

Explanation:
boats and streams


10)   It takes P 1 hour to row to a place and to come back. If the river is running at 2.4 km/hr and P has a speed of 12 km/hr in still water, what distance is the place from P’s starting point?
- Published on 10 Mar 17

a. 4.8 km
b. 3.6 km
c. 6.25 km
d. 5.76 km
Answer  Explanation 

ANSWER: 5.76 km

Explanation:
boats and streams


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