A) Can't be determined
B) 56 km/h
C) 54 km/h
D) None of these
Correct Answer: B
Solution :
If the' speed of the train be x km/h, then \[10=\frac{150}{(x-2)\times \frac{5}{18}}\] or, \[10\times (x-2)\times \frac{5}{18}=150\] or, \[x-2=\frac{150\times 18}{10\times 5}=54\] \[\therefore \] \[x=54+2=56\,\,\text{km/h}\]You need to login to perform this action.
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