Aptitude - Boats and Streams - Discussion
Discussion Forum : Boats and Streams - General Questions (Q.No. 6)
6.
A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?
Answer: Option
Explanation:
| Rate downstream = |  |
16 |  kmph = 8 kmph. |
| 2 |
| Rate upstream = | |
16 | kmph = 4 kmph. |
| 4 |
 Speed in still water = |
1 | (8 + 4) kmph = 6 kmph. |
| 2 |
Video Explanation: https://youtu.be/3D8uAfzz3l0
Discussion:
13 comments Page 2 of 2.
Mrithula said:
1 decade ago
Formula for finding the speed of the boat is
1/2(upstream speed+ downstream speed)
here upstream speed=8 and
downstream speed=4
1/2(upstream speed+ downstream speed)
here upstream speed=8 and
downstream speed=4
Shashi said:
1 decade ago
Why we are adding both and multiply by 1/2(8+4) ?
Shahed ahmed said:
1 decade ago
Why we multiply 1/2 (8+4) ?
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