Sawaal
86
Q:

A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C which is at midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ? 

A) 180 km B) 160 km
C) 140 km D) 120 km

Answer:   A) 180 km



Explanation:

Speed in downstream = (14 + 4) km/hr = 18 km/hr;

Speed in upstream = (14 – 4) km/hr = 10 km/hr.

Let the distance between A and B be x km. Then,

x/18 + (x/2)/10 = 19 ⇔ x/18 + x/20 = 19 ⇒ x = 180 km.

Subject: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO
Related Questions
Q:

A boat covers a distance of 14 km upstream and 16 km downstream in 9 hours. It covers a distance of 12 km upstream and 40 km downstream in 11hours. What is the speed (in km/hr) of the boat in still water?

 

A)  5 B)  2
C)  3 D) 4
 
Answer & Explanation Answer: A)  5

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

0 196
Q:

A man, rowing a boat, covers a distance of 16 km in two hours downstream. He covers half the distance in same amount of time when rowing upstream. Calculate the speed of the stream.

A) 4 kmph B) 2 kmph
C) 3 kmph D) 1 kmph
 
Answer & Explanation Answer: B) 2 kmph

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

1 293
Q:

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km/hr) of the boat in still water?

 

A) 10 B) 12
C) 14 D) 8
 
Answer & Explanation Answer: B) 12

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

4 444
Q:

A boat cover row 12 km upstream in 4 hours and can cover the same distance downstream in 3 hours. What is the speed (in km/hr) of the boat in still water?

 

A) 3.5 B) 3
C) 2.5 D) 2
 
Answer & Explanation Answer: A) 3.5

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

1 686
Q:

The upstream speed of the boat is 40 kmph and the speed of the boat in still water is 55 kmph. What is the downstream speed of the boat?

A) 75 kmph B) 70 kmph
C) 60 kmph D) 65 kmph
 
Answer & Explanation Answer: B) 70 kmph

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

3 785
Q:

A boat goes 8 km upstream and 12 km downstream in 7hours. It goes 9 km upstream and 18 km downstream in 9 hours. What is the speed (in km/h) of the boat in still water?

 

A) 5 B) 4
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

3 774
Q:

A man can row his boat at a speed of speed of 4 kmph and he finds that the time taken rowing upstream is double to that taken downstream. Find the speed of the stream (in kmph).

A) 1.5 B) 1.3
C) 2 D) 1
 
Answer & Explanation Answer: B) 1.3

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

9 832
Q:

Ramu can row 9 kmph in still water. It takes him twice as long to row up as to row down. Find the rate of stream.

A) 16 kmph B) 8 kmph
C) 3 kmph D) 9 kmph
 
Answer & Explanation Answer: B) 8 kmph

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Boats and Streams - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

2 648