Question

Tabung kemasan bola tenis berkapasitas 5 buah. jika diameter bola 2r maka volume ruang yg kosong diantara bola-bola adalah....?
#tolong pakai jalan y....
a. 1/10
b. 3 1/3
c. 5
d. 6 2/3

Answer 1

Verified answer

Volume 5 bola = 5 ( 4/3.phi.r^3)
= 20/3.phi.r^3
volume tabung = phi.r^2.t dengan t = 10r
= phi.r^2.10r
= 10 phi.r^3
ruang kosong = volume tabung - 5 volume bola.
= 10 phi.r^3 - 20/3 phi.r^3
= 30/3 phi.r^3 - 20/3.phi r^3
= 10/3.phi.r^3
= 3 1/3 phi.r^3....(B)