A) 60 km/h
B) 72 km/h
C) 78 km/h
D) 84 km/h
Correct Answer: C
Solution :
Speed of second train \[=\frac{364}{4}=91\,\,\text{km/h}\] \[\therefore \]\[7x=91\] \[\therefore \] \[6x=\frac{91}{7x}\times 6x=78\,\,\text{km/h}\]You need to login to perform this action.
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