tolong dibantu yaa pake cara

[tex]V \: tabung = \pi \times r \times r \times t \\ = \frac{22}{7} \times 7 \times 7 \times 20 \\ = 3080cm {}^{ 3 } \\ V \: kerucut = \frac{1}{3} \times \pi \times r \times r \times t \\ = \frac{1}{3} \times \frac{22}{7} \times 7 \times 7 \times 15 \\ = 770cm {}^{3} \\ V \: gasing = 3080 + 770 \\ = 3850cm {}^{3} [/tex]

semoga membantu ya.. jan lupa follow y:D