Jawabanmu

2014-09-12T15:22:40+07:00
Kadar air = 1/4
Kadar air yang berkurang selama 2 hari
= 1/5 + 1/5
= 2/5

1/4 - 2/5 = 5/20 - 8/20 = -3/20 kadar air
2014-09-12T16:28:55+07:00