A) \[72\text{ }km/h\]
B) \[36\text{ }km/h\]
C) \[81\text{ }km/h\]
D) \[108\text{ }km/h\]
Correct Answer: C
Solution :
Difference of time =11 minutes 45 seconds - 11 minutes = 45 seconds Distance covered by sound in 45 seconds = Distance covered by train in 11 minutes \[330\times 45=11\times 60\times \]Speed of train Speed of train \[=\left( \frac{330\times 45}{11\times 60} \right)m/\sec .\] \[=\left( \frac{45}{2}\times \frac{18}{5} \right)\,kmph.\]You need to login to perform this action.
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