bikin jalanyaa yaaa plissee.bagi yg jawab rezekinya berlimpah.

Volume drum = phi.r².t
Volume drum = 22/7 x 7 dm x 7 dm x 9 dm
Volume drum = 198 dm³
Volume drum = 198 liter
Drum belum terisi = 100 - 75 = 25%
25/100 x 198 = 49,5 liter
Jadi agar drum terisi penuh harus di isi lagi sebanyak 49,5 liter