Sebuah nasi tumpeng yang berbentuk kerucut memiliki ukuran jari-jari (r) 7 cm dan tinggi 15 cm. Berapakah volume dari nasi tumpeng itu?

Sebuah nasi tumpeng yang berbentuk kerucut memiliki ukuran jari-jari (r) 7 cm dan tinggi 15 cm. Berapakah volume dari nasi tumpeng itu?

Jawaban : 770 cm³

Ingat!
Rumus volume kerucut
V = 1/3 πr²t
dengan
V = volume
π = 22/7 atau 3,14
r = jari-jari
t = tinggi

Pembahasan
karena tumpeng berbentuk kerucut maka dicari volume kerucut

volume = 1/3 πr²t
= 1/3 × 22/7 × 7² × 15
= 22/21× 49 × 15
= 16.170/21
= 770 cm³

Jadi, volume nasi tumpeng adalah 770 cm³

Baca Juga :  Miss Silvia works at Graha Hospital. She looks after sick children at night. She starts to work at 10 p.m. and finishes at 7 o'clock in the morning. She goes to work by a motorcycle. She has twenty children in her section. She stays up all night. She looks at the children many times during the night. She sometimes sits and talks to a child. The children sleep most of the time. She usually wakes up them at 5 a.m. and gives them breakfast at 6 a.m. After that, she goes home at 7 a.m. Although she feels very tired, she loves her job