tatorbug123 tatorbug123

27-10-2016
Physics

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A train travels 90 kilometers in 1 hours, and then 60 kilometers in 3 hours. What is its average speed

Respuesta :

27-10-2016

Average speed = (total distance) / (total time to cover the distance)

   = (90km + 60km) / (1hr + 3hr)

   = (150 km) / (4 hr)

   =    37.5 km/hr    .

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