A) \[125\,km/hr\]
B) \[25\,km/hr\]
C) \[90\,km/hr\]
D) \[75\,km/hr\]
Correct Answer: C
Solution :
Speed of first train \[=\frac{150}{30}=5m/\sec \] Let the speed of second train be \[x\text{ }m/sec\] Relative speed \[=(5+x)\,m/\sec \] \[\therefore \] \[\frac{300}{5+x}=10\] \[50+10x=300\] \[x=\frac{300-50}{10}=25m/\sec .\] \[=25\times \frac{18}{5}=90km/h\]You need to login to perform this action.
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