What is the length of the dotted line in the diagram below? Leave your answer in simplest radical form.

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Can someone me out here and the tell me the greatest common factor

∆red ≅ ∆ by rule will give brainiest if possible