Question

What is the velocity of a train that traveled 420 miles northeast to northwest between two cities in 3.5 hours?

Answer 1

`120` miles per hour

Explanation:

Assuming that the total displacement stays in one direction, we can use the formula:

`barv=(vecd)/t`

And so, we got: `vecd=420 \ "miles",t=3.5 \ "hours"`.

Plugging in those values into the equation, we get,

`barv=(420 \ "miles")/(3.5 \ "hours")`

`=120 \ "miles per hour"`