The length of the bird's head is 9 centimeters. His tail is equal to the size of his head plus half of the size of his body. His body is the size of his head plus his tail. What is the length of the bird?​

72cm. Th head is 9cm. The tail is 18 + 9= 27cm. The body is 9 + 18 + 9= 36cm. 9 + 27 + 36= 72cm.