Rust: How do you implement a newtype pattern?

1struct Meters(f64);
2struct Seconds(f64);
3
4impl Meters {
5    fn new(value: f64) -> Self {
6        Self(value)
7    }
8}
9
10fn speed(distance: Meters, time: Seconds) -> f64 {
11    distance.0 / time.0
12}
13
14let d = Meters(100.0);
15let t = Seconds(9.58);
16println!("{}", speed(d, t));