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r=3,5cm
t=15cm
ditanya V....?? Lp...??
V=1/3×π×r²×t
=1/3×22/7×3,5²×15
=192,5 cm³
s=√3,5+15²
=√12,25+225
=√237,25
=15,40
Lp=π×r(r+s)
=22/7×3,5(3.5+15,40)
=11x18,9
=207,9cm²
=1/3.3,14.3,5.3,5.15 (angka 3 dan 15 dicoret)
=192,325 cm kubik
s = 3,5 x 3,5 + 15x15
= 12.25 + 225
= 237.25
diakar menjadi 15,4
s = 15,4 cm
L.kc = L.alas + L. selimut
= phi.r.r + phi.r.s
= 3,14x3,5x3,5 + 3,14x3,5x15,4
= 38,465 + 169,246
= 207,711 cm persegi
Maaf banget ya kalo salah :)