Aptitude - Boats and Streams - Discussion
Discussion Forum : Boats and Streams - General Questions (Q.No. 1)
1.
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.
Answer: Option
Explanation:
Speed downstream = (13 + 4) km/hr = 17 km/hr.
| Time taken to travel 68 km downstream = |  |
68 |  hrs = 4 hrs. |
| 17 |
Discussion:
46 comments Page 3 of 5.
HONEY said:
9 years ago
Good explanation, Thanks to all.
Gaurank Verma said:
9 years ago
Since ship is going downstream,
Hence,
Resultant speed = 13 + 4 = 17 km/h.
Now,
Time = distance / speed.
==> Time = 68/17 = 4hours.
Therefore, the boat will take 4 hrs. To go 68 km downstream.
Hence,
Resultant speed = 13 + 4 = 17 km/h.
Now,
Time = distance / speed.
==> Time = 68/17 = 4hours.
Therefore, the boat will take 4 hrs. To go 68 km downstream.
Narayana reddy said:
9 years ago
Thanks for providing the answer and explanation.
Raj said:
9 years ago
Hi, please give me a solution for this question.
"A man can row 8 kms in still water. If in a river flowing at 2 km an hour, it takes him 24 minutes to row to a place and come back, how far of is this place?"
"A man can row 8 kms in still water. If in a river flowing at 2 km an hour, it takes him 24 minutes to row to a place and come back, how far of is this place?"
A.Santhosh said:
9 years ago
Boat -> a kmph& stream-> b kmph
A= boat speed at still water
B= water speed=rate of current=stream speed.
Along with the flow, Dss(downstream speed) = a+b,
Againist with the flow, Uss(upstream speed) = a-b.
So, a + b = 13 + 4 = 17,
Distance = 68 km,
Time = Dist/Uss,
T = 68/17 = 4hrs.
A= boat speed at still water
B= water speed=rate of current=stream speed.
Along with the flow, Dss(downstream speed) = a+b,
Againist with the flow, Uss(upstream speed) = a-b.
So, a + b = 13 + 4 = 17,
Distance = 68 km,
Time = Dist/Uss,
T = 68/17 = 4hrs.
(1)
Vadivel said:
9 years ago
Thaks for explaining the answer friends.
(1)
Birla Jyothi Swaroop said:
9 years ago
Perfect Explanation, thank @Santhosh.
(1)
Ardhendu Sikdar said:
8 years ago
13+4 = 17km/hr.
Now, 48/17 = 4hr.
Now, 48/17 = 4hr.
(1)
Mythu said:
8 years ago
Thanks for all your explanations.
(1)
Elizabath said:
8 years ago
Give a clear explanation to get it.
(1)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers