tolong dibantu jawabanya ya pliss

1. diket r= jari jari = 10 phi=314/100 ditanya keliling lingkaran phi x r x r = 314/100 x 10 x 10 = 314.
2. diket volume 110 phi = 22/7
= 2 x phi x r = 110
= 2 x 22/7 x r = 110
=44/7 = 110 x 7/22
= 5 x 7 = 35
3. diket diameter 14 r 7 phi 22/7 ditanya volume phi x r x r = 22/7 x 7 x 7 = 154 maaf jika sedikit dan maaf jika ada yg salah