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:
111 comments Page 9 of 12.
Hema said:
1 decade ago
I'm not understand this step 16/5*1/2 please help me.
Prahadee said:
1 decade ago
I don't understand the ratio. Can anyone explain me?
Bhaskar said:
8 years ago
Explain me, why are we taking x=1 before 16x/5*1/2?
Saransh said:
8 years ago
@Amit Lamba.
Thank you, it was easy to understand.
Thank you, it was easy to understand.
Vino said:
8 years ago
This method is easy to understand. Thank you @Hely.
Shubh said:
9 years ago
Does anyone have an easy way to solve the problem?
Dhiraj Take said:
8 years ago
@Deena R:.
Divide numerator and denominatr by 12.
Divide numerator and denominatr by 12.
Pratiksha said:
7 years ago
How that 8:3 ratio comes? Please anyone help me.
Deena.r said:
8 years ago
How ll can the 48/60 =4/5? Please explain why?
Pradeesh said:
1 decade ago
How can the y-x/2 become the current ratio?
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