Tolong jwab pakai cara no 19 dan20

20). diket : La = 240 cm^2
t = 15 cm
ditanya : V.....?
V = 1/3 x La x t
= 1/3 x 240 x 15
= 1/3 x 360
= 1200 cm^3
jawaban B
maaf no.19 sya kurang tau