Question : A train is moving at a speed of 80 km/h and covers a certain distance in 4.5 hours. The speed of the train to cover the same distance in 4 hours should be:
Option 1: 100 km/h
Option 2: 70 km/h
Option 3: 85 km/h
Option 4: 90 km/h
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Correct Answer: 90 km/h
Solution :
Speed of train = 80 km/h
Total distance covered by the train = 80 × 4.5 = 360 km
Therefore, the speed required to cover the same distance in 4 hours:
Speed = $\frac{\text{Distance}}{\text{Time}}$
= $\frac{360}{4}$ = 90 km/h
Hence, the correct answer is 90 km/h.
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