wo trains are running in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then the speed of each train (in km/hr) isSelect one:a. 32b. 36c. 10d. 18
Question
wo trains are running in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then the speed of each train (in km/hr) isSelect one:a. 32b. 36c. 10d. 18
Solution
To find the speed of each train, we can use the formula:
Speed = Distance / Time
Given that the length of each train is 120 meters and they cross each other in 12 seconds, we can calculate the total distance covered by both trains as the sum of their lengths:
Total distance = 120 meters + 120 meters = 240 meters
Now, we can substitute the values into the formula:
Speed = 240 meters / 12 seconds
To convert the speed from meters per second to kilometers per hour, we need to multiply by a conversion factor of 3.6:
Speed = (240 meters / 12 seconds) * 3.6
Simplifying the equation:
Speed = 20 meters per second * 3.6
Speed = 72 kilometers per hour
Therefore, the speed of each train is 72 kilometers per hour.
The correct answer is option b. 36.
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