tolong bantu ya kak no 20,21,

no 1 = 2 rim = 1000 lembar+56lembar=....331=725 lembar = (B)
no 2 = 0,8 liter × 1000= 800 CC = 800 CC - 320 CC = 480 CC = 480 CC - 410 CC = 70 CC / = 70 ml ( A )