r kerucut 3,5 dan tingginya 15 cm ditanya volume dan luas sisi K rucut

diket.
r=3,5
t=15
s=√r²+t²
=√3,5+15
=√12,25+225
=√237,25
=15,5
dit.
volume.
luas.
jawab?
volume=1/3×π×r²×t
=1/3×22/7×3,5×3,5×15
=1/3×4042,5/7
=1/3×577,5
=577,5/3
=192,5cm³

luas=π×r(r+s)
=22/7×3,5(3,5+15,5)
=77/7(19)
=11×19
=209 cm²