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10 menit = ?
15mnt:3 = 3/4 :3
5 menit = 1/4
10 menit = 2/4 halman
------------ *2/3
10 = 5/12
jadi, dlm 10mnt dani mampi menyapu 5/12 halaman
edit:
15 = 3/4
------------ *2/3
10 = 6/12
jadi, dlm 10mnt dani mampi menyapu 6/12 halaman = 1/2 halaman