Question : A train moves at a speed of 35 km/hr for the first 2 hours and at a speed of 50 km/hr for the next 4 hours. Find the average speed of the train during the entire journey.
Option 1: 47 km/hr
Option 2: 50 km/hr
Option 3: 45 km/hr
Option 4: 35 km/hr
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Correct Answer: 45 km/hr
Solution : Total distance = 35 × 2 + 50 × 4 = 70 + 200 = 270 km Total time = 2 + 4 = 6 hr Average speed = $\frac{270}{6}$ = 45 km/hr Hence, the correct answer is 45 km/hr.
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