Tolong soal 3-4 pakai cara biar ngerti

3.
1 L = 1.000 ml
5g /250ml
5/250 x 4 / 4 = 20 g / 1000 ml = 20 g/L

4.
pertumbuhan = 8 - 2 = 6 cm /5 hari = 1,2 cm/hari