The correct answer for the question that is being presented above is this one: "81.7 oz. "
Vol of Cylinder is r² h
r is diameter/2 = 10/2 = 5in
h = 8in
Volume is (25)(8) = 628.31853071795864 cubic inches
628.31853071795864 in³ (.13 oz/in³) = 81.68140899333462 oz
rounding to 81.7 oz.