The instruction state that Sumi may need 4/9 square yards of one type of material and 2/3 square yards of another type of material for a project. She buys exactly that amount. After finishing the project, however, she has 8/18 square yards left that she did not use. What is the total amount of square yards of material Sumi used?

বাংলাদেশ তেল, গ্যাস ও খনিজসম্পদ কর্পোরেশন (পেট্রোবাংলা) Titas Gas Co.Ltd - Deputy Asst. Engineer - 18.02.2011 গণিত পরিমিতি (Mensuration) 2011