nickporreca123 nickporreca123

20-07-2017
Mathematics

contestada

A train travels 51 kilometers in 4 hours, and then 69 kilometers in 5 hours. What is its average speed?

Respuesta :

musiclover10045 musiclover10045

20-07-2017

add the mileage 51+69 = 120 km

add the times 4+5=9 hours

now divide the two

120/9 = 13.3 km per hour average speed

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