6. ABCD is a square and O is the intersection point of diagonals AC and BD. Triangle PQR has base QR of 20 centimeters long. The ratio of the area of ABCD to PQR is 8 : 5. The area of triangle AOB is 256 square centimeters. How long is the height drawn from point P of triangle PQR? A. 16 B. 32 C. 64 D. 128 E. 256 7. Jack and Jill bring eggs to sell at a market. Everyday Jack and Jill sell the same number of eggs but different prices. Jack sells eggs at price 2 eggs for 5 baht, and earnsa baht each day. Jill sells eggs at price 3 eggs for 7 baht, and earnsb baht each day. One day Jack asks Jill to sell his eggs. Jill sells her eggs together with Jack’s eggs at price 5 eggs for 12 baht, and earns c baht. Let x, y, z be positive integers where a :b : c= x : y : z. What is the possible minimum value of x + y + z ? A. 217 B. 214 C. 215 D. 221 E. 229