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

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