| A man can row at 5 km/h in still water. If the velocity of current is 1 km/h and it takes him 1 h to row to a place and comes back. How far is the place? |
A) 2.5 km
B) 3 km
C) 2.4 km
D) 3.6 km
Correct Answer: C
Solution :
| Let the distance be x km. |
| Speed upstream \[=5-1=4\text{ }km/h\] |
| Speed downstream \[=5+1=6\text{ }km/h\] |
| According to the question, |
| \[\frac{x}{6}+\frac{x}{4}=1\]\[\Rightarrow \]\[2x+3x=12\] |
| \[\Rightarrow \] \[5x=12\,\,\,\Rightarrow \,\,x=2.4\,km\] |
You need to login to perform this action.
You will be redirected in
3 sec
