a goods train 400 m long is travelling at a speed of 45 km per hour. How long would it take to cross another train standing at the platform that is 450 m long
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Step-by-step explanation: first convert 45 km/h into m/s by dividing 5/18
450-400=50
Use the formul
Time =d/s
=50/12.5=4
Time = 4 second
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