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.