tolong dijawab nomor 1 sampai 5

1)1800/6=300
Maka skala=1:300{B}
2)(75/5)×15
=15²=225{C}
3)((32/4)×3)×32
=(8×3)×32
=24×32=768{B}
4)10/16=15/(X+3)
5/8=15/(X+3)
(X+3)=15×8/5
(X+3)=24
X=21
5)4000/3=y/25
=4000×25/3=y
3333,33...=y (cm)
33,333...=y(m){C}