wiljoystoltz3545 wiljoystoltz3545
  • 03-10-2019
  • Physics
contestada

The speed limit on some interstate highways is roughly 115 km/h. What is the meters per second? how many miles per hours is this?

Respuesta :

Mergus Mergus
  • 04-10-2019

Answer:

Speed in meter per second = 31.94 m/s

Speed in miles per hour = 71.46 miles/h

Explanation:

Speed is measure of distance traveled per unit time. It is :

[tex]Speed=\frac {Distance}{Time}[/tex]

Given the speed = 115 km/ h

Considering, 1 km = 1000 m

Also, 1 h = 3600 s

So,

[tex]Speed=\frac {115\times 1000\ m}{3600\ s}=31.94\ m/s[/tex]

Thus speed in meter per second = 31.94 m/s

Considering, 1 km = 0.621371 miles

So,

[tex]Speed=\frac {115\times 0.621371\ miles}{h}=71.46\ miles/h[/tex]

Thus, speed in miles per hour = 71.46 miles/h

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