Tolong dibantu jawab ya

l.alas=πr²=3,14.3²=3,14.9=28,26
cari nilai s dulu
s²=r²+t²=3²+4²=9+16=25=√25=5
l.sel=πrs=3,14.3.5=47,1
lp=πr(s+r)=3,14.3(5+3)=9,42.8=75,36
volum=1/3πr²t=1/3.3,14.3.3.4=3,14.12=37,68