Anybody know the real answer to this?

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?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base