A lemon loaf completely fills a pan measuring 20\:cm by 18\:cm by 5\:cm. The loaf is cut into 25 pieces of equal volume. If the density of the loaf is 2\:g/cm^3, how much does each of the 25 pieces weigh?
Answer Choices
A. 72\:g
B. 288\:g
C. 36\:g
D. 144\:g
E. 720\:g