A train 120 m long passes a telegraph post in 6 seconds. Find the speed of the train in Km/hr

60 72 70 80

72

Speed = \(\frac{Distance }{Time }\) Speed = \(\frac{120 }{6 }\) m/s Speed = 20 m/s Speed in km/hr: 20 x \(\frac{ 18}{5 }\) = 72 km/hr *Note*: To convert m/s to km/hr we multiply by \(\frac{ 18}{5 }\) To convert km/hr to m/s we multiply by \(\frac{5}{18}\)