gemar matematika no 9-12 pls tolong

9. r = 14cm t= 20cm
v tabung = πr²t
22/7×14×14×20 = 12320cm³

10. d= 7 t= 16dm
v tabung = ¼πd²t
¼×22/7×7×7×16 = 616dm³

11. D=14dm maka r =7dm t=10dm
v tabung = πr²t
22/7×7×7×10 = 1540dm³

12. d = 10cm maka r =5cm t =50cm
v tabung = πr²t
3,14×5×5×50 = 3925cm³

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