A $300 \text{ m}$ long train crosses a man running in the opposite direction at $10 \text{ km/h}$ in $12 \text{ seconds}$. Find the speed of the train.
Options:
- A: $70 \text{ km/h}$
- B: $75 \text{ km/h}$
- C: $80 \text{ km/h}$
- D: $85 \text{ km/h}$
Related Practice Questions:
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- The difference between the compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is ₹25. Find the sum.
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