Respuesta :

cheesetoasty

Answer:

30 kilometers

Step-by-step explanation:

I just looked at it and knew it was 30 k as the longest

This is how I knew:

let's convert every unit into meters

90cm = 0.9m

  40m = 40m

30km = 30000m

40mm = 0.04

easy :)

good luck

-cheesetoasty

12688534

Answer:

30 Kilometers

Step-by-step explanation: