Leopards are three times faster than athletes. Run 20 meters more than an athlete every second.

Drawing is easy to understand. The following figure

As can be seen from the picture, leopards run 20 meters more than humans every second, twice as much as leopards.

This is a "difference problem"

Difference =20, multiple =3

Decimal (person) = difference ÷ (multiple-1)

=20÷(3- 1)

= 10m

Leopard Run 10x3=30m per second.