A) 60 km/h
B) 72 km/h
C) 78 km/h
D) 84 km/h
Correct Answer: C
Solution :
[c] Let speeds of trains are 6x and 7x km/h, respectively. \[\therefore \] \[7x=\frac{364}{4}\] \[\Rightarrow \] \[x=\frac{364}{4\times 7}=13\] \[\therefore \]Speed of first train\[=6\times 13=78\,km/h\] |
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