Question : A 900-metre-long train crosses a 1200 metres long platform completely in 70 seconds. What is the speed of the train?
Option 1: 117 km/hr
Option 2: 108 km/hr
Option 3: 99 km/hr
Option 4: 90 km/hr
Answer (1)
10th Jan, 2024
Correct Answer: 108 km/hr
Solution :
Total distance = 900 + 1200 = 2100 m
Total time = 70 s
Average speed = $\frac{2100}{70}$
= 30 m/s
= 30 × $\frac{18}{5}$ km/hr
= 108 km/hr
Hence, the correct answer is 108 km/hr.
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