contestada

mitsu travels a certain distance at 30 miles per hour and returns the same route at 65 miles per hour. what is his average speed in miles per hour for the round trip?

Respuesta :

118010041cuhk

Answer:

41.05

Step-by-step explanation:

30*65*2/(65+30)

Answer:

41.05 mile per hour

Step-by-step explanation:

let distance of one leg be x

1st leg time: x/30

2nd leg time: x/65

total travel time = x/30 + x/65

total distance traveled = x + x = 2x

average speed = distance / time

= 2x / (x/30 + x/65)

= 2 / (1/30 + 1/65)

= 41.05 mile per hour

Otras preguntas