tolong... yaaa... terima... kasih

12. d = v/w = 300/15 = 20 liter/menit ( b )
13. 3/5×240=144:4=46 detik ( b )
14. L=pi × r × r = 22/7×21×21 = 1,386 ( a )
15. L = 3/4 × pi × r × r = 3/4×3,14×10×10= 3/4×314= 235,5 ( c )
16. a.25