Question : The distance between places A and B is 999 km. An express train leaves place A at 6 am and runs at a speed of 55.5 km/h. The train stops on the way for 1 hour 20 minutes. It reaches B at:
Option 1: 1:20 am
Option 2: 12 pm
Option 3: 6 pm
Option 4: 11 pm
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Correct Answer: 1:20 am
Solution : The speed of the express train is 55.5 km/h. The distance is 999 km. We know the formula Time = $\frac{\text{Distance}}{\text{Speed}}$. ⇒ Required time = $\frac{999}{55.5}$ = 18 hours. So, the train will reach B at (6 am + 18 hours + 1 hour 20 minutes) = 1:20 a.m. Hence, the correct answer is 1:20 am.
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