| A train crosses a platform in 30 s travelling with a speed of 60 km/h. If the length of the train be 200 m, then the length of the platform is |
A) 420 m
B) 500 m
C) 300 m
D) 250 m
Correct Answer: C
Solution :
| Given, speed of train |
| \[=60\,km/h=60\times \frac{5}{18}\,\,m/s\] |
| \[=\frac{50}{3}m/s\]and time = 30 s |
| Let length of platform = x m |
| \[\because \] Distance = Time \[\times \] Speed |
| \[\Rightarrow \] \[200+x=\frac{50}{3}\times 30\] |
| \[\Rightarrow \] \[200+x=500\] |
| \[\therefore \] \[x=300\,m\] |
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