If an object falls 225 feet in three seconds, how long will it take the object to fall 81 feet

1.08 seconds because if you use cross multiplication by putting 3 over 225 = x over 81, using cross multiplication is 3 times 81 and 225 times x. So then you have 3 times 81 is 243 then divide by 225 to get x and you get 1.08 secs