kuy soal sbm lagi, ku masih belum bisa pahami

h=h0+v0 sin 30°. t - ½gt²
=30+20.½.3 - ½.10.9
=15 m
x=vo cos 30° t
=20.½√3.3
=30√3 m
h:x=15:(30√3)
=1:2√3