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- A train is moving with a speed of 30 m/s. Its speed isOption: 1 72 km/h Option: 2 100
A train is moving with a speed of 30 m/s. Its speed is
Option: 1
72 km/h
Option: 2
100 km/h
Option: 3
120 km/h
Option: 4
108 km/h
Answers (1)
Given :
Speed = 30 m/s
But you need to answer in kilometres per hour(km/h)
Step by step conversion
To convert m/s to km/h use this formula:
1 m/s = 18/5 km/h
So,
30 m/s = 30 x 18/5 = 540/5 = 108 km/h
Final answer : 108 km/h ( option 4)
Why multiply by 18/5
Because:
1 km = 1000 meters
1 hour = 3600 seconds
1 m/s = 1000/3600 x km/h = 18/5 km/h
View full answer
