A) 5:9
B) 7:15
C) 15:13
D) 17:15
E) 7:11
Correct Answer: B
Solution :
Let the length of Train B be x m. Then, length of train \[A=\frac{x}{3}m\] Now, ratio of speed of Train A to that of Train \[B=\left( \frac{x}{3}\div 50 \right):(x\div 70)\] \[=\frac{x}{3\times 50}\times \frac{70}{x}=7:15\]You need to login to perform this action.
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