| A 222 m long train crosses a pole in 6 s. The same train crosses a man running in the same direction in 10 s. What will be the speed of man? [LIC (AAO) 2013] |
A) 15 m/s
B) 17 m/s
C) 18 m/s
D) 14 m/s
E) None of these
Correct Answer: A
Solution :
| Speed of train \[=\frac{222}{6}=37\,m/s\] |
| If the speed of man be x m/s. |
| Then, \[\frac{222}{37-x}=10\] |
| \[\Rightarrow \] \[222=370-10x\] |
| \[\Rightarrow \] \[-148=-10x\,\,\Rightarrow \,\,x=14.8\,\,m/s\] |
| \[\therefore \] \[x\approx 15\,m/s\] |
You need to login to perform this action.
You will be redirected in
3 sec
