Question

A plane flies at a speed of 350 miles per hour. How far will it travel in 3 hours?

Answer 1

`1050` miles

Explanation:

The speed is, by definition, the ratio between the distance traveled and the time passed. In fact, if you look at your statement, you will read that the plane flies at `350` miles per hours. In other words, it takes a hour for the plane to advance `350` miles.

You may also read it the other way around: with each passing hour, the plane travels an additional `350` miles.

Maybe this last point of view is the most useful to solve your problem: in `3` hours time, the plane will have traveled `350` miles, three times.

To solve the problem with formulas, you may write

`v = s/t`

But we knot that `v = 350`, and `t=3`, and we want to find `s`:

`v = s/t \iff s = vt = 350*3 = 1050`