Question

Gabriella wants to tile a room with an area of 320 ft.². The width of the room is 4/5 of its length. What are the length and width of the room?

Answer 1

Length - a
Width - b
Area = a * b 
320 = a & b 
b = 4/5a
320 = a^2 /5
400 = a^2
a = $\sqrt{400}$
a = 20
b = 16