tolong dibantu kak...pakai cara

16.
5 ha=5x10.000m²
=50.000m²
245 are=245x100
=24.500m²
>=50.000m²-24.500m²-25.000m²
=500m² (C)
17.
124.000ml=124.000 : 1.000 liter
=124 liter
98dm³=98 liter
124 liter+60 liter = 186 liter
186 liter-98 liter = 86 liter (A)
18.
t=07.55-07.25
=30 mnt
=0.5/ ½ jam
s=30km
V=S:t
=30 : ½
=30 x 2
=60 km/jam (D)