A 10-feet tree makes an 18 ft shadow. About how tall is a person who makes a 1 feet ft shadow at the same time?

So this is ratios

actual height to shadow height=10 to 18=10:18=10/18=5/9

ratio is 5:9

if the shadow height=12 then find actual height

x:12=5:9 since they should be in the same ratio

x/12=5/9

multiply both sides by 12

x=60/9

x=6 and 6/9

x=6 and 2/3

height of person is 6 and 2/3 foot or 6.66ft or 6ft and 8 inches