Question

How many miles are equal to 4 kilometers?

Answer 1

About `2.5` miles

Explanation:

The exact conversion factor is:

`1color(white)(.)"mile" = 1.609344color(white)(.)"km"`

Since this is close to `1.6 = 8/5` we can reckon that:

`4color(white)(.)"km" ~~ 5/8 * 4color(white)(.)"miles" = 2.5color(white)(.)"miles"`

If the `4color(white)(.)"km"` figure were accurate then the miles figure would be closer to:

`4/1.609344 ~~ 2.4855color(white)(.)"miles"`