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08-03-2018
Physics

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A train travels 86 kilometers in 1 hours, and then 98 kilometers in 1 hours. What is its average speed?

Respuesta :

Edufirst Edufirst

08-03-2018

Answer: average speed = 92 km/h

Explanation:

1) Data:

distance 1 = 86 km
time 1 = 1 hour

distance 2 = 98 km
time 2 = 1 hour

average speed = ?

2) Formula:

average speed = distance / time

3) distance = distance 1 + distance 2 = 86 km + 98 km = 184 km

4) time = time 1 + time 2 = 1 h + 1 h = 2h

5) average speed = 184 km / 2h = 92 km/h

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