jabbir1102 jabbir1102

01-01-2019
Physics

contestada

A train travels 81 kilometers in 3 hours, and then 63 kilometers in 4 hours. What is its average speed?

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zaidmir1987 zaidmir1987

01-01-2019

Avg speed =Total Distance / Total Time Taken

Therefore = Avg speed = 144/7 = 20.57 km/h

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