Aptitude - Boats and Streams - Discussion
Discussion Forum : Boats and Streams - General Questions (Q.No. 3)
3.
A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
Answer: Option
Explanation:
Let the man's rate upstream be x kmph and that downstream be y kmph.
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
 |
 |
x x 8 | 4 |  |
= (y x 4) |
| 5 |
| |
44 | x =4y |
| 5 |
| y = |
11 | x. |
| 5 |
 Required ratio = |
|
y + x | |
: | |
y - x | |
| 2 | 2 |
| = | |
16x | x | 1 | |
: | |
6x | x | 1 | |
| 5 | 2 | 5 | 2 |
| = | 8 | : | 3 |
| 5 | 5 |
= 8 : 3.
Discussion:
109 comments Page 10 of 11.
Srinu said:
1 decade ago
I didn't understand how 8*4/5 will get.
Anish said:
1 decade ago
How this required ratio? pls explain?
(1)
Saranya said:
1 decade ago
Can you explain the process clearly?
Raj Patel said:
10 years ago
I don't understand (x*8 4) = (y*4)5.
Hari said:
7 years ago
Anyone explain me to get the answer.
Sourav ghosh said:
3 years ago
Thanks for this short trick @Mahesh.
(7)
Ahamed Kabeer said:
4 years ago
Thank you everyone for explaining.
Navya said:
1 decade ago
I got it. 8*5+4=44.
Fractions!
Fractions!
Anom said:
3 months ago
It was good. Thank you, @Anshul.
(1)
Sorsta said:
1 year ago
Well said, Thank you @Mahesh.
(3)
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