Tolong kerjakan no 6

Kpk
30 = 2 x 3 x 5
45 = 3² x 5
50 = 2² x 3 x 5
kpk = 2² x 3² x 5 = 180 detik = 3 menit
08.00 + 00.03 = 08.03 (a.)