diameter drum 35cm. tinggi 50cm. jika 1/5bagian diisi Air brp liter isinya?

v = phi x r x r x t
   = 314/100 x 175/10 cm x 50 cm x 50 cm
   = 137.375 cm^3
   = 1/5 x 137.375 cm^3 = 27.475 cm^3