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 1 of 5.
Madhu said:
3 years ago
Speed(s) = boat speed(u) + stream speed(v) = 13 + 4 = 17km/h and distance = 68km;
We know that speed = distance/time.
But we have to find the time then,
Time = distance/speed.
Time = 68/17 = 4 hours.
We know that speed = distance/time.
But we have to find the time then,
Time = distance/speed.
Time = 68/17 = 4 hours.
(20)
Ammu S said:
3 years ago
thank you everyone for the explanation.
(12)
Gopal Bariha said:
2 years ago
Ans:
D + U/2 = 13 km/h.
(x+4) + (x-4)/2 = 13.
X = 13.
The Speed of the boat is 13km/h.
The Speed of the stream is given 4km/h.
Now
Time taken by the boat to go 68 km downstream.
S = D/T (Boat speed +Stream speed).
T = D/S
= 13 + 4 = 17,
T = 68/17 = 4 Hour(Ans).
D + U/2 = 13 km/h.
(x+4) + (x-4)/2 = 13.
X = 13.
The Speed of the boat is 13km/h.
The Speed of the stream is given 4km/h.
Now
Time taken by the boat to go 68 km downstream.
S = D/T (Boat speed +Stream speed).
T = D/S
= 13 + 4 = 17,
T = 68/17 = 4 Hour(Ans).
(11)
Hanumanthu vinayakarao said:
6 years ago
Distance = speed / time.
Then time = distace/ speed.
Speed = boat speed+stream speed.
Speed = 13+4=17 distance = 68.
D = 68/17 = 4hrs.
Then time = distace/ speed.
Speed = boat speed+stream speed.
Speed = 13+4=17 distance = 68.
D = 68/17 = 4hrs.
(7)
Dharmendra said:
3 years ago
In this question, we have seen boat and steam both speeds are in one side so we have to include both speeds [13+4]=17 and distance is 68.
So, 68÷17 = 4hour.
So, 68÷17 = 4hour.
(6)
Hunde Namomsa said:
4 years ago
Thanks everyone for explaining the answer.
(5)
Swetha said:
6 months ago
13 + 4,
= 17.
68/17 = 4.
= 17.
68/17 = 4.
(3)
Nikita said:
2 years ago
Relative speed = B + w = 15km/hr.
T = D/Relative speed,
T = 68/15=4hours.
T = D/Relative speed,
T = 68/15=4hours.
(3)
Vaishnavi Sah said:
7 months ago
Downstream speed = 13 + 4 = 17 km/hr.
Time = Distance/Downstream speed.
= 68 km/17 km/hr.
To simplify, divide both numerator and denominator by 17:
Time = 68 ÷ 17.
= 4 hours.
Answer: 4 hours.
Time = Distance/Downstream speed.
= 68 km/17 km/hr.
To simplify, divide both numerator and denominator by 17:
Time = 68 ÷ 17.
= 4 hours.
Answer: 4 hours.
(2)
Tanisha said:
5 years ago
Thanks @Srikant.
(2)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers